1,3-butadiene profile

1,3-Butadiene is a colorless, flammable gas at room temperature with a slightly sweet odor. It is a highly reactive and versatile organic compound that is used as a building block in the production of synthetic rubber, plastics, and other chemicals. 1,3-Butadiene is produced through the steam cracking of hydrocarbons, primarily naphtha, and is also a byproduct of the production of other chemicals, such as ethylene and propylene. 1,3-Butadiene is a key component in the manufacture of synthetic rubber, particularly styrene-butadiene rubber (SBR), which is used in tires, belts, and other rubber products. It is also used in the production of acrylonitrile butadiene styrene (ABS) plastics, which are used in a wide variety of applications, such as automotive parts, appliances, and toys. 1,3-Butadiene is a known human carcinogen, and exposure to high levels of the compound can cause respiratory problems, dizziness, and headaches. Because of its industrial importance and potential health effects, 1,3-butadiene is a subject of significant scientific research.'

buta-1,3-diene : A butadiene with unsaturation at positions 1 and 3. [Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

ID Source	ID
PubMed CID	7845
CHEMBL ID	537970
CHEBI ID	39478
CHEBI ID	39479
MeSH ID	M0099583

Synonym
1,3-butadiene
.alpha.,.gamma.-butadiene
106-99-0
buta-1,3-diene
inchi=1/c4h6/c1-3-4-2/h3-4h,1-2h
vinyl ethylene
butadien [polish]
un 1010
butadiene-1,3-uninhibited
butadiene ,
alpha-gamma-butadiene
buta-1,3-dieen [dutch]
nci-c50602
butadiene, 1,3-
biethylene
butadieen [dutch]
butadiene monomer
erythrene
hsdb 181
pyrrolylene
buta-1,3-dien [german]
ccris 99
einecs 203-450-8
vinylethylene
CHEBI:39478 ,
ch2=ch-ch=ch2
alpha,gamma-butadiene
bivinyl
divinyl
1,3-butadien
buta-1,3-dien
1,3-butadiene, >=99%
B0675
CHEMBL537970
9003-17-2
1,3-butadiene, homopolymer
AKOS007930655
68514-37-4
buta-1,3-dieen
ec 203-450-8
unii-jsd5fgp5vd
butadien
jsd5fgp5vd ,
butadieen
FT-0606587
butadiene [inci]
1,3-butadiene [hsdb]
1,3-butadiene [mi]
1,3-butadiene [iarc]
1,3 butadiene
ch2=chch=ch2
25339-57-5
B4358
B4835
B4359
DTXSID3020203 ,
1,3-butadiene, >=99.6%
mfcd00008659
1,3-butadiene, puriss., >=99.5% (gc)
1,3-butadiene, purum, >=98.0%
1,3-butadiene (ca. 15% in hexane)
1,3-butadiene 95%
1,3-butadiene 200 microg/ml in methanol
ch22ch1ch2ch2
alpha,<>-butadiene
130983-70-9
1983-06-8
1,3-butadiene (ca. 15% in toluene)
1,3-butadiene 100 microg/ml in methanol
Q161503
1,3-butadiene 250 microg/ml in n,n-dimethylacetamide
1,3-butadiene 150 microg/ml in n,n-dimethylacetamide
1,3-butadiene 400 microg/ml in n,n-dimethylacetamide
1,3-butadiene 10 microg/ml in n,n-dimethylacetamide
1,3-butadiene 50 microg/ml in n,n-dimethylacetamide
1,3-butadiene (ca. 13% in tetrahydrofuran, ca. 2mol/l)
1,3-butadiene (~15per cent by weight in toluene)
1,3-butadiene-2,3-d2
26952-74-9
dtxcid10203
1,3-butadiene (iarc)
butadiene-1,3
alpha, gamma-butadiene
butadiene-1, 3, stabilized
butadienes, stabilized
1,3-butadiene, (stabilized)
chebi:39479
1,3-butadiene 1000 microg/ml in methanol

Excerpt	Reference	Relevance
"3-Butene-1,2-diol (butenediol), a major metabolite of 1,3-butadiene (butadiene), can undergo either detoxification or biotransformation to potentially toxic metabolites, including 3,4-epoxy-1,2-butanediol and hydroxymethylvinyl ketone (HMVK)."	( Effect of n-hexane on the disposition and toxicity of the 1,3-butadiene metabolite 3-butene-1,2-diol. Bird, MG; Iba, MM, 2007)	0.83
" The chronic ReV value, along with a unit risk factor developed by the TCEQ, will be used to evaluate ambient air monitoring data so that the general public is protected against adverse health effects from chronic exposure to BD."	( A chronic reference value for 1,3-butadiene based on an updated noncancer toxicity assessment. Curry, AL; Grant, RL; Haney, J; Honeycutt, M, 2010)	0.65
" That is, this paradigm would be protective of any mechanism that resulted in adverse effects typically observed in guideline studies, because product safety assessment is based upon observed apical effects to drive an overall NOAEL that is the basis to set reference doses for a risk assessment."	( Is the current product safety assessment paradigm protective for epigenetic mechanisms? Alyea, RA; Gollapudi, BB; LeBaron, MJ; Moore, NP; Rasoulpour, RJ, )	0.13
"These adverse apical effects are the culmination of all molecular events, regardless of mechanism and may include alterations in the epigenome secondary to the actions of those mechanism(s)."	( Is the current product safety assessment paradigm protective for epigenetic mechanisms? Alyea, RA; Gollapudi, BB; LeBaron, MJ; Moore, NP; Rasoulpour, RJ, )	0.13
" The Ames test results showed that CHB induced point mutation but not frameshift mutation, whereas the toxic effects of CBO made it difficult to reliably assess the mutagenic potential of CBO in the two strains."	( Cytotoxicity, genotoxicity, and mutagenicity of 1-chloro-2-hydroxy-3-butene and 1-chloro-3-buten-2-one, two alternative metabolites of 1,3-butadiene. An, J; Elfarra, AA; Liu, XJ; Yu, YX; Zeng, FM; Zhang, XY, 2013)	0.59
" EBD and its analog with a hydroxy substituent at C1 were found to be highly toxic to FANCD2-deficient chicken and human cells."	( An unexpected butadiene diolepoxide-mediated genotoxicity implies alternative mechanism for 1,3-butadiene carcinogenicity. Carro, S; Gold, A; Nakamura, J; Zhang, Z, 2021)	0.84

Excerpt	Reference	Relevance
" In order to translate these results into conditions of human exposure, we developed a physiologically based pharmacokinetic (PBPK) model, which is presented here."	( A pharmacokinetic model to describe toxicokinetic interactions between 1,3-butadiene and styrene in rats: predictions for human exposure. Baur, C; Csanády, GA; Filser, JG; Johanson, G; Kessler, W; Kreuzer, PE; Stei, P, 1993)	0.52
" A physiologically based pharmacokinetic model of the uptake, tissue distribution, and metabolism of butadiene was constructed to determine if the biochemical kinetic constants obtained from in vitro studies are consistent with the observed in vivo uptake and metabolism."	( Species differences in the production and clearance of 1,3-butadiene metabolites: a mechanistic model indicates predominantly physiological, not biochemical, control. Kohn, MC; Melnick, RL, 1993)	0.53
" A physiologically based pharmacokinetic (PBPK) model was developed to describe the simultaneous disposition of BD and styrene in mice coexposed by inhalation."	( Pharmacokinetic model describing the disposition of butadiene and styrene in mice. Bond, JA; Leavens, TL, 1996)	0.29
" To achieve this objective, known pathways of 1,2-epoxy-3-butene (butadiene monoepoxide; BMO) and BDE metabolism were incorporated into a physiologically based pharmacokinetic model by scaling rates determined in vitro."	( Physiologically based pharmacokinetic modeling of 1,3-butadiene, 1,2-epoxy-3-butene, and 1,2:3,4-diepoxybutane toxicokinetics in mice and rats. Bond, JA; Medinsky, MA; Schlosser, PM; Sweeney, LM, 1997)	0.55
" As a tutorial, we first simplify a 2-compartment pharmacokinetic model by symbolic lumping."	( Lumping in pharmacokinetics. Bois, FY; Brochot, C; Tóth, J, 2005)	0.33
"Physiologically based pharmacokinetic (PBPK) models have proven to be successful in integrating and evaluating the influence of age- or gender-dependent changes with respect to the pharmacokinetics of xenobiotics throughout entire lifetimes."	( A stochastic whole-body physiologically based pharmacokinetic model to assess the impact of inter-individual variability on tissue dosimetry over the human lifespan. Beaudouin, R; Brochot, C; Micallef, S, 2010)	0.36
" Physiologically based pharmacokinetic (PBPK) models provide realistic descriptions of xenobiotics' absorption, distribution, metabolism, and excretion processes."	( Modeling Pharmacokinetics. Bois, FY; Brochot, C, 2016)	0.43

Excerpt	Reference	Relevance
"To investigate the genotoxicity of gaseous toxicants carbon monoxide (CO) and 1,3-butadiene in vitro, a novel combination technology-the in vitro γH2AX high content screening assay combined with air-liquid interface system (ALIS) was established."	( Genotoxicity evaluation of carbon monoxide and 1,3-butadiene using a new joint technology: the in vitro γH2AX HCS assay combined with air-liquid interface system. Chen, H; Hou, H; Hu, Q; Liu, Y; Wang, A; Zhang, S, 2019)	1

Excerpt	Reference	Relevance
"The adduct formed by the reaction of 1,3-butadiene monoxide, a major metabolite of the mutagen and carcinogen 1,3-butadiene, with the N-terminal valine of haemoglobin was used as a dosimeter for the bioavailability of reactive metabolites."	( Biological monitoring of 1,3-butadiene: species differences in haemoglobin binding in rat and mouse. Albrecht, OE; Filser, JG; Neumann, HG, 1993)	0.86
" However, studies on how they interact to influence their bioavailability are scarce."	( Insight into Bioaccumulation of Decabromodiphenyl Ethane in Fu, M; Han, Y; Hu, S; Ling, S; Peng, C; Qiao, Z; Tan, J; Zhang, W; Zhou, S, 2023)	0.91

Excerpt	Relevance	Reference
"The traditional multistage (MS) model of carcinogenesis implies several empirically testable properties for dose-response functions."	( An exact analysis of the multistage model explaining dose-response concavity. Cox, LA, 1995)	0.29
" The working group identified a series of urgent research needs to provide the appropriate data for the application of the parallelogram model, such as identification of metabolic pathways in different rodent species and humans, metabolic studies in mice, rats and humans considering metabolic polymorphisms, studies of adducts to DNA and hemoglobin especially of DEB and other butadiene metabolites in rodents and humans, studies of mutational spectra (mutational fingerprinting) in somatic and germinal cells, confirmation of the human hprt mutation data, conformation of the rodent malformation data, dose-response studies in rodent germ cell tests and studies on repair kinetics of mono-adducts induced by EB as opposed to repair of cross-links produced by DEB."	( 1,3-Butadiene working group report. Adler, ID; Cochrane, J; Osterman-Golkar, S; Skopek, TR; Sorsa, M; Vogel, E, 1995)	1.73
" The methodology was evaluated with Hb samples obtained by reacting butadiene monoepoxide (BMO), the primary reactive metabolite of 1,3-butadiene, with blood and by dosing BMO to rats and mice."	( Biological monitoring of butadiene exposure by measurement of haemoglobin adducts. Megens, HJ; Richardson, KA; van Sittert, NJ; Webb, JD, 1996)	0.5
" "Comprehensive Realism" is an emerging quantitative weight-of-evidence based risk assessment methodology for both cancer and noncancer health effects which utilizes probability distributions and decision analysis techniques to reflect more of the available human and animal dose-response data."	( Using PBPK modeling and comprehensive realism methodology for the quantitative cancer risk assessment of butadiene. Hays, SM; Reitz, RH; Sielken, RL, 1996)	0.29
" The dose-response for BMO followed a second order curve at this time interval, with maximum MN induction at the dose of 186 mumol/kg and lower induction of higher doses."	( Germ cell mutagenicity of three metabolites of 1,3-butadiene in the rat: induction of spermatid micronuclei by butadiene mono-, di-, and diolepoxides in vivo. Lähdetie, J; Peltonen, K; Sjöblom, T, 1997)	0.55
" Within this project a dominant lethal test and a heritable translocation test were performed with male mice to study the dose-response relationships for the respective endpoints."	( Dose response study for 1,3-butadiene-induced dominant lethal mutations and heritable translocations in germs cells of male mice. Adler, ID; Filser, J; Gonda, H; Schriever-Schwemmer, G, 1998)	0.61
" The methods developed in this work provide the means to study accumulation, repair and dose-response relationships of BD-DNA adducts in vivo."	( Quantitative analysis of 1,3-butadiene-induced DNA adducts in vivo and in vitro using liquid chromatography electrospray ionization tandem mass spectrometry. Chiang, SY; Swenberg, JA; Walker, VE, 1998)	0.6
" Survival adjusted tumor rates in mice were fit to a Weibull model for estimation of the shape of the dose-response curves, estimation of ED10 values (the estimated exposure concentration associated with an increased cancer risk of 10%) and comparison of these parameters with those for 1,3-butadiene."	( Multiple organ carcinogenicity of inhaled chloroprene (2-chloro-1,3-butadiene) in F344/N rats and B6C3F1 mice and comparison of dose-response with 1,3-butadiene in mice. Chou, BJ; Grumbein, SL; Melnick, RL; Miller, RA; Portier, CJ; Roycroft, JH; Sills, RC, 1999)	0.72
" Supra-linear dose-response curves were observed in BD-exposed mice, indicating a higher efficiency of mutant induction at lower concentrations of BD."	( Mutagenicity of 1,3-butadiene at the Hprt locus of T-lymphocytes following inhalation exposures of female mice and rats. Bauer, MJ; Chen, T; Heflich, RH; Henderson, RF; Meng, Q; Reilly, AA; Walker, DM; Walker, VE, 1999)	0.65
" Generally, the brain tumor responses were considered equivocal, because the characteristics of potential neurocarcinogenic agents (such as statistically significant increased incidences, decreased latency and/or survival, and demonstration of dose-response relationships) were not observed."	( Examination of low-incidence brain tumor responses in F344 rats following chemical exposures in National Toxicology Program carcinogenicity studies. Boorman, GA; Hailey, JR; Haseman, JK; Melnick, RL; Neal, J; Sills, RC, )	0.13
" The dose-response for mutations induced at the cII locus was essentially equal after DEB exposure of BBM1 and BBR1 fibroblasts."	( Micronuclei and gene mutations in transgenic big Blue((R)) mouse and rat fibroblasts after exposure to the epoxide metabolites of 1, 3-butadiene. Erexson, GL; Tindall, KR, 2000)	0.31
" Urinary excretion of radioactivity, following dosing with DMDTC and exposure to 200 ppm C-14 butadiene for 6 h, was markedly reduced in rats, but increased in mice."	( The influence of co-exposure to dimethyldithiocarbamate on butadiene metabolism. Green, T; Moore, R; Toghill, A, 2001)	0.31
"01 (1%) from a lifetime continuous exposure to 1,3-butadiene based on a linear dose-response model and the cumulative 1,3-butadiene dose metric (ppm-years)."	( Dose-response implications of the University of Alabama study of lymphohematopoietic cancer among workers exposed to 1,3-butadiene and styrene in the synthetic rubber industry. Sielken, RL; Valdez-Flores, C, 2001)	0.78
" The dose-response relationship for the formation of adduct G4 was approximately linear for all tissues studied for both rats and mice exposed in the 1-20 ppm range."	( Dose responses for DNA adduct formation in tissues of rats and mice exposed by inhalation to low concentrations of 1,3-[2,3-[(14)C]-butadiene. Booth, ED; Kilgour, JD; Robinson, SA; Watson, WP, 2004)	0.32
"The method can be applied to predict the risk of carcinogenic agents for which dose-response data exist and no health-based limit value can be established."	( [A simple method for risk assessment and its application to 1,3-butadiene]. Bertazzi, PA; Pesatori, AC; Zocchetti, C, )	0.37
" In particular, these guidelines encourage the use of mechanistic data in support of dose-response characterization at doses below those at which an increase in tumor frequency over background levels might be detected."	( Cancer risk assessment for 1,3-butadiene: data integration opportunities. Preston, RJ, 2007)	0.64
" Exposure estimates were updated and an exposure estimate validation study as well as dose-response modeling were conducted by these researchers."	( Development of a unit risk factor for 1,3-butadiene based on an updated carcinogenic toxicity assessment. Curry, AL; Grant, RL; Haney, J; Honeycutt, M, 2009)	0.62
" A number of factors related to metabolism can also contribute to nonlinearity in the dose-response relationship, including enzyme induction and inhibition, depletion of tissue glutathione, and saturation of oxidative metabolism."	( 1,3-Butadiene: I. Review of metabolism and the implications to human health risk assessment. Albertini, RJ; Gargas, ML; Kirman, CR; Sweeney, LM, 2010)	1.8
" The MOAs for BD carcinogenesis will be used to guide key decisions made in the quantitative cancer dose-response assessment."	( 1,3-Butadiene: III. Assessing carcinogenic modes of action. Albertini, RA; Gargas, ML; Kirman, CR, 2010)	1.8
" A meta-analysis was conducted in which the available dose-response data from rats and mice were normalized using an internal dose estimate (DEB in blood) that is causally related to ovarian toxicity."	( Quantitative human health risk assessment for 1,3-butadiene based upon ovarian effects in rodents. Grant, RL; Kirman, CR, 2012)	0.64
" Dose-response analyses from toxicity studies from government reports were evaluated and the most sensitive cancer and noncancer endpoints were selected."	( Tobacco smoke-related health effects induced by 1,3-butadiene and strategies for risk reduction. Bos, PM; Soeteman-Hernández, LG; Talhout, R, 2013)	0.65
" In HL60 cells exposed for 3 h to 0-10 μM DEB, overlapping dose-response curves suggested a direct relationship between 1,4-bis-(guan-7-yl)-2,3-butanediol crosslink adduct formation (R = 0."	( 1,3-Butadiene metabolite 1,2,3,4 diepoxybutane induces DNA adducts and micronuclei but not t(9;22) translocations in human cells. Albertini, RJ; Carter, EW; Degner, A; Nicklas, JA; Tretyakova, N; Walker, DM; Walker, VE, 2019)	1.96
" Select F1 offspring (1/sex/litter) were dosed 7 days (postnatal days 21-27 or 28-34), then necropsied."	( A reproductive and developmental toxicity screening study of 1,3-butadiene in Sprague-Dawley rats. Barranco, WT; Budinsky, R; Cagen, S; Erraguntla, N; Kirman, CR; Koehler, MW; Marty, MS; North, C; Rushton, EK; Shen, H, 2021)	0.86
" Using these methods, the dose-response relationships in mice and rats exhibit improved concordance, and result in subchronic and chronic inhalation reference values of 29 and 10 ppm, respectively, for BD."	( Use of biomarker data and metabolite relative potencies to support derivation of noncancer reference values based on the reproductive and developmental toxicity effects of 1,3-butadiene. Erraguntla, N; Hays, SM; Kirman, CR; North, CM; Shen, H; Tretyakova, NY, 2022)	0.92
" EPA's cancer dose-response assessment for BD was published in 2002 and was primarily based on a study on workers exposed to BD in the North American synthetic Styrene-Butadiene Rubber (SBR) Industry developed by the University of Alabama at Birmingham (UAB)."	( An updated lymphohematopoietic and bladder cancers risk evaluation for occupational and environmental exposures to 1,3-butadiene. Budinsky, R; Cagen, S; Erraguntla, N; Kirman, CR; Valdez-Flores, C, 2022)	0.93
" We observed positive dose-response relationships of DHBMA level with glucose homeostasis indices and ALP levels, as well as with the risks of prediabetes and diabetes (all P < 0."	( Associations of urinary 1,3-butadiene metabolite with glucose homeostasis, prediabetes, and diabetes in the US general population: Role of alkaline phosphatase. Chen, W; Feng, X; Liang, R; Shi, D; Wang, B; Yang, M; Yu, L; Zhang, Y; Zhou, M, 2023)	1.22

Role	Description
carcinogenic agent	A role played by a chemical compound which is known to induce a process of carcinogenesis by corrupting normal cellular pathways, leading to the acquistion of tumoral capabilities.
mutagen	An agent that increases the frequency of mutations above the normal background level, usually by interacting directly with DNA and causing it damage, including base substitution.
[role information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Class	Description
butadiene
[compound class information is derived from Chemical Entities of Biological Interest (ChEBI), Hastings J, Owen G, Dekker A, Ennis M, Kale N, Muthukrishnan V, Turner S, Swainston N, Mendes P, Steinbeck C. (2016). ChEBI in 2016: Improved services and an expanding collection of metabolites. Nucleic Acids Res]

Assay ID	Title	Year	Journal	Article
AID433903	Hepatotoxicity in mouse assessed as carcinogenic potency	2009	European journal of medicinal chemistry, Sep, Volume: 44, Issue:9	Development of QSAR models for predicting hepatocarcinogenic toxicity of chemicals.
AID603952	In-vitro blood to lung partition coefficients of the compound, logP(lung) (human/rat)	2008	European journal of medicinal chemistry, Mar, Volume: 43, Issue:3	Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
AID603951	In-vitro air to blood partition coefficients of the compound, logK(blood) (human/rat)	2008	European journal of medicinal chemistry, Mar, Volume: 43, Issue:3	Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
AID603950	In-vitro air to lung partition coefficients of the compound, logK(lung) (human/rat)	2008	European journal of medicinal chemistry, Mar, Volume: 43, Issue:3	Air to lung partition coefficients for volatile organic compounds and blood to lung partition coefficients for volatile organic compounds and drugs.
[information is prepared from bioassay data collected from National Library of Medicine (NLM), extracted Dec-2023]

Timeframe	Studies, This Drug (%)	All Drugs %
pre-1990	65 (8.19)	18.7374
1990's	218 (27.46)	18.2507
2000's	222 (27.96)	29.6817
2010's	211 (26.57)	24.3611
2020's	78 (9.82)	2.80
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Publication Type	This drug (%)	All Drugs (%)
Trials	6 (0.72%)	5.53%
Reviews	80 (9.66%)	6.00%
Case Studies	0 (0.00%)	4.05%
Observational	0 (0.00%)	0.25%
Other	742 (89.61%)	84.16%
[information is prepared from research data collected from National Library of Medicine (NLM), extracted Dec-2023]

Substance	Relationship Strength	Studies	Trials	Classes	Roles
ethylene dichloride ethylene dichloride: RN given refers to 1,2-isomer; structure given in first source. 1,2-dichloroethane : A member of the class of chloroethanes substituted by two chloro groups at positions 1 and 2.	2	1	0	chloroethanes	hepatotoxic agent; mutagen; non-polar solvent
alpha-ketobutyric acid alpha-ketobutyric acid: RN given refers to parent cpd; structure. 2-oxobutanoic acid : A 2-oxo monocarboxylic acid that is the 2-oxo derivative of butanoic acid.	2.01	1	0	2-oxo monocarboxylic acid; short-chain fatty acid
acetaldehyde Acetaldehyde: A colorless, flammable liquid used in the manufacture of acetic acid, perfumes, and flavors. It is also an intermediate in the metabolism of alcohol. It has a general narcotic action and also causes irritation of mucous membranes. Large doses may cause death from respiratory paralysis.. acetaldehyde : The aldehyde formed from acetic acid by reduction of the carboxy group. It is the most abundant carcinogen in tobacco smoke.. aldehyde : A compound RC(=O)H, in which a carbonyl group is bonded to one hydrogen atom and to one R group.. acetyl group : A group, formally derived from acetic acid by dehydroxylation, which is fundamental to the biochemistry of all forms of life. When bound to coenzyme A, it is central to the metabolism of carbohydrates and fats.	8.55	8	0	aldehyde	carcinogenic agent; EC 3.5.1.4 (amidase) inhibitor; electron acceptor; Escherichia coli metabolite; human metabolite; mouse metabolite; mutagen; oxidising agent; Saccharomyces cerevisiae metabolite; teratogenic agent
acetone methyl ketone : A ketone of formula RC(=O)CH3 (R =/= H).	3.12	5	0	ketone body; methyl ketone; propanones; volatile organic compound	EC 3.5.1.4 (amidase) inhibitor; human metabolite; polar aprotic solvent
adenine [no description available]	3.25	6	0	6-aminopurines; purine nucleobase	Daphnia magna metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
ammonium hydroxide azane : Saturated acyclic nitrogen hydrides having the general formula NnHn+2.	1.96	1	0	azane; gas molecular entity; mononuclear parent hydride	EC 3.5.1.4 (amidase) inhibitor; metabolite; mouse metabolite; neurotoxin; NMR chemical shift reference compound; nucleophilic reagent; refrigerant
benzene [no description available]	9.76	64	1	aromatic annulene; benzenes; volatile organic compound	carcinogenic agent; environmental contaminant; non-polar solvent
benzoic acid Benzoic Acid: A fungistatic compound that is widely used as a food preservative. It is conjugated to GLYCINE in the liver and excreted as hippuric acid.. benzoic acid : A compound comprising a benzene ring core carrying a carboxylic acid substituent.. aromatic carboxylic acid : Any carboxylic acid in which the carboxy group is directly bonded to an aromatic ring.	2.01	1	0	benzoic acids	algal metabolite; antimicrobial food preservative; drug allergen; EC 1.13.11.33 (arachidonate 15-lipoxygenase) inhibitor; EC 3.1.1.3 (triacylglycerol lipase) inhibitor; human xenobiotic metabolite; plant metabolite
bromide Bromides: Salts of hydrobromic acid, HBr, with the bromine atom in the 1- oxidation state. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	2.41	1	0	halide anion; monoatomic bromine
butyraldehyde [no description available]	2.15	1	0	butanals	biomarker; Escherichia coli metabolite; mouse metabolite
1-butanol 1-Butanol: A four carbon linear hydrocarbon that has a hydroxy group at position 1.. butan-1-ol : A primary alcohol that is butane in which a hydrogen of one of the methyl groups is substituted by a hydroxy group. It it produced in small amounts in humans by the gut microbes.	2.95	4	0	alkyl alcohol; primary alcohol; short-chain primary fatty alcohol	human metabolite; mouse metabolite; protic solvent
butyric acid Butyric Acid: A four carbon acid, CH3CH2CH2COOH, with an unpleasant odor that occurs in butter and animal fat as the glycerol ester.. butyrate : A short-chain fatty acid anion that is the conjugate base of butyric acid, obtained by deprotonation of the carboxy group.. butyric acid : A straight-chain saturated fatty acid that is butane in which one of the terminal methyl groups has been oxidised to a carboxy group.	2.15	1	0	fatty acid 4:0; straight-chain saturated fatty acid	human urinary metabolite; Mycoplasma genitalium metabolite
carbamates [no description available]	2.21	1	0	amino-acid anion
carbon monoxide Carbon Monoxide: Carbon monoxide (CO). A poisonous colorless, odorless, tasteless gas. It combines with hemoglobin to form carboxyhemoglobin, which has no oxygen carrying capacity. The resultant oxygen deprivation causes headache, dizziness, decreased pulse and respiratory rates, unconsciousness, and death. (From Merck Index, 11th ed). carbon monoxide : A one-carbon compound in which the carbon is joined only to a single oxygen. It is a colourless, odourless, tasteless, toxic gas.	11.94	14	2	carbon oxide; gas molecular entity; one-carbon compound	biomarker; EC 1.9.3.1 (cytochrome c oxidase) inhibitor; human metabolite; ligand; metabolite; mitochondrial respiratory-chain inhibitor; mouse metabolite; neurotoxin; neurotransmitter; P450 inhibitor; probe; signalling molecule; vasodilator agent
methane Methane: The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed). methane : A one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms. It is a colourless, odourless, non-toxic but flammable gas (b.p. -161degreeC).	8.48	7	0	alkane; gas molecular entity; mononuclear parent hydride; one-carbon compound	bacterial metabolite; fossil fuel; greenhouse gas
chlordecone [no description available]	2.05	1	0	cyclic ketone; organochlorine compound	insecticide; persistent organic pollutant
chlorine chloride : A halide anion formed when chlorine picks up an electron to form an an anion.	2.97	4	0	halide anion; monoatomic chlorine	cofactor; Escherichia coli metabolite; human metabolite
coumarin 2H-chromen-2-one: coumarin derivative	7.05	1	0	coumarins	fluorescent dye; human metabolite; plant metabolite
salicylic acid Scalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL).	2.04	1	0	monohydroxybenzoic acid	algal metabolite; antifungal agent; antiinfective agent; EC 1.11.1.11 (L-ascorbate peroxidase) inhibitor; keratolytic drug; plant hormone; plant metabolite
hippuric acid hippuric acid: RN given refers to parent cpd; structure in Merck Index, 9th ed, #4591. N-benzoylglycine : An N-acylglycine in which the acyl group is specified as benzoyl.	7.01	1	0	N-acylglycine	human blood serum metabolite; uremic toxin
propionaldehyde propionaldehyde: may cause respiratory irritation; RN given refers to parent cpd; structure. propanal : An aldehyde that consists of ethane bearing a formyl substituent. The parent of the class of propanals.	2.07	1	0	alpha-CH2-containing aldehyde; propanals	Escherichia coli metabolite
formaldehyde paraform: polymerized formaldehyde; RN given refers to parent cpd; used in root canal therapy	10.58	13	0	aldehyde; one-carbon compound	allergen; carcinogenic agent; disinfectant; EC 3.5.1.4 (amidase) inhibitor; environmental contaminant; Escherichia coli metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
glycerol Moon: The natural satellite of the planet Earth. It includes the lunar cycles or phases, the lunar month, lunar landscapes, geography, and soil.	2.44	2	0	alditol; triol	algal metabolite; detergent; Escherichia coli metabolite; geroprotector; human metabolite; mouse metabolite; osmolyte; Saccharomyces cerevisiae metabolite; solvent
hydrogen cyanide Hydrogen Cyanide: Hydrogen cyanide (HCN); A toxic liquid or colorless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials.. hydrogen cyanide : A one-carbon compound consisting of a methine group triple bonded to a nitrogen atom	2.06	1	0	hydracid; one-carbon compound	Escherichia coli metabolite; human metabolite; poison
hydrogen Hydrogen: The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.. dihydrogen : An elemental molecule consisting of two hydrogens joined by a single bond.	8.02	4	0	elemental hydrogen; elemental molecule; gas molecular entity	antioxidant; electron donor; food packaging gas; fuel; human metabolite
hydroquinone [no description available]	2.04	1	0	benzenediol; hydroquinones	antioxidant; carcinogenic agent; cofactor; Escherichia coli metabolite; human xenobiotic metabolite; mouse metabolite; skin lightening agent
methanol Methanol: A colorless, flammable liquid used in the manufacture of FORMALDEHYDE and ACETIC ACID, in chemical synthesis, antifreeze, and as a solvent. Ingestion of methanol is toxic and may cause blindness.. primary alcohol : A primary alcohol is a compound in which a hydroxy group, -OH, is attached to a saturated carbon atom which has either three hydrogen atoms attached to it or only one other carbon atom and two hydrogen atoms attached to it.. methanol : The primary alcohol that is the simplest aliphatic alcohol, comprising a methyl and an alcohol group.	7.78	3	0	alkyl alcohol; one-carbon compound; primary alcohol; volatile organic compound	amphiprotic solvent; Escherichia coli metabolite; fuel; human metabolite; mouse metabolite; Mycoplasma genitalium metabolite
naphthalene [no description available]	7.44	2	0	naphthalenes; ortho-fused bicyclic arene	apoptosis inhibitor; carcinogenic agent; environmental contaminant; mouse metabolite; plant metabolite; volatile oil component
nickel Nickel: A trace element with the atomic symbol Ni, atomic number 28, and atomic weight 58.69. It is a cofactor of the enzyme UREASE.. nickel ion : A nickel atom having a net electric charge.. nickel atom : Chemical element (nickel group element atom) with atomic number 28.	8.05	4	0	metal allergen; nickel group element atom	epitope; micronutrient
nitrites Nitrites: Salts of nitrous acid or compounds containing the group NO2-. The inorganic nitrites of the type MNO2 (where M=metal) are all insoluble, except the alkali nitrites. The organic nitrites may be isomeric, but not identical with the corresponding nitro compounds. (Grant & Hackh's Chemical Dictionary, 5th ed)	1.94	1	0	monovalent inorganic anion; nitrogen oxoanion; reactive nitrogen species	human metabolite
nitrous oxide Nitrous Oxide: Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream.. dinitrogen oxide : A nitrogen oxide consisting of linear unsymmetrical molecules with formula N2O. While it is the most used gaseous anaesthetic in the world, its major commercial use, due to its solubility under pressure in vegetable fats combined with its non-toxicity in low concentrations, is as an aerosol spray propellant and aerating agent for canisters of 'whipped' cream.	2.04	1	0	gas molecular entity; nitrogen oxide	analgesic; bacterial metabolite; food packaging gas; food propellant; general anaesthetic; greenhouse gas; inhalation anaesthetic; NMDA receptor antagonist; raising agent; refrigerant; vasodilator agent
4-nitrophenol 4-nitrophenol: RN given refers to parent cpd. mononitrophenol : A nitrophenol that is phenol carrying a single nitro substituent at unspecified position.. 4-nitrophenol : A member of the class of 4-nitrophenols that is phenol in which the hydrogen that is para to the hydroxy group has been replaced by a nitro group.	2.08	1	0	4-nitrophenols	human xenobiotic metabolite; mouse metabolite
phenanthrene phenanthrene : A polycyclic aromatic hydrocarbon composed of three fused benzene rings which takes its name from the two terms 'phenyl' and 'anthracene.'	7.03	1	0	ortho-fused polycyclic arene; ortho-fused tricyclic hydrocarbon; phenanthrenes	environmental contaminant; mouse metabolite
phosphoric acid phosphoric acid: concise etchant is 37% H3PO4. phosphoric acid : A phosphorus oxoacid that consists of one oxo and three hydroxy groups joined covalently to a central phosphorus atom.	2.08	1	0	phosphoric acids	algal metabolite; fertilizer; human metabolite; NMR chemical shift reference compound; solvent
phthalic acid phthalic acid: RN given refers to parent cpd; structure in Merck Index, 9th ed, #7178. phthalic acid : A benzenedicarboxylic acid cosisting of two carboxy groups at ortho positions.	2.02	1	0	benzenedicarboxylic acid	human xenobiotic metabolite
1-propanol 1-Propanol: A colorless liquid made by oxidation of aliphatic hydrocarbons that is used as a solvent and chemical intermediate.. propan-1-ol : The parent member of the class of propan-1-ols that is propane in which a hydrogen of one of the methyl groups is replaced by a hydroxy group.	2.04	1	0	propan-1-ols; short-chain primary fatty alcohol	metabolite; protic solvent
propionic acid propionic acid : A short-chain saturated fatty acid comprising ethane attached to the carbon of a carboxy group.	2.01	1	0	saturated fatty acid; short-chain fatty acid	antifungal drug
pyruvic acid Pyruvic Acid: An intermediate compound in the metabolism of carbohydrates, proteins, and fats. In thiamine deficiency, its oxidation is retarded and it accumulates in the tissues, especially in nervous structures. (From Stedman, 26th ed). pyruvic acid : A 2-oxo monocarboxylic acid that is the 2-keto derivative of propionic acid. It is a metabolite obtained during glycolysis.	6.93	1	0	2-oxo monocarboxylic acid	cofactor; fundamental metabolite
sulfuric acid sulfuric acid : A sulfur oxoacid that consists of two oxo and two hydroxy groups joined covalently to a central sulfur atom.	3.53	2	0	sulfur oxoacid	catalyst
thymine [no description available]	1.98	1	0	pyrimidine nucleobase; pyrimidone	Escherichia coli metabolite; human metabolite; mouse metabolite
toluene methylbenzene : Any alkylbenzene that is benzene substituted with one or more methyl groups.	9.17	16	0	methylbenzene; toluenes; volatile organic compound	cholinergic antagonist; fuel additive; neurotoxin; non-polar solvent
uric acid Uric Acid: An oxidation product, via XANTHINE OXIDASE, of oxypurines such as XANTHINE and HYPOXANTHINE. It is the final oxidation product of purine catabolism in humans and primates, whereas in most other mammals URATE OXIDASE further oxidizes it to ALLANTOIN.. uric acid : An oxopurine that is the final oxidation product of purine metabolism.. 6-hydroxy-1H-purine-2,8(7H,9H)-dione : A tautomer of uric acid having oxo groups at C-2 and C-8 and a hydroxy group at C-6.. 7,9-dihydro-1H-purine-2,6,8(3H)-trione : An oxopurine in which the purine ring is substituted by oxo groups at positions 2, 6, and 8.	2.25	1	0	uric acid	Escherichia coli metabolite; human metabolite; mouse metabolite
1-aminobenzotriazole [no description available]	2	1	0
1-anilino-8-naphthalenesulfonate 1-anilino-8-naphthalenesulfonate: RN given refers to parent cpd. 8-anilinonaphthalene-1-sulfonic acid : A naphthalenesulfonic acid that is naphthalene-1-sulfonic acid substituted by a phenylamino group at position 8.	2.02	1	0	aminonaphthalene; naphthalenesulfonic acid	fluorescent probe
2,2'-dipyridyl 2,2'-Dipyridyl: A reagent used for the determination of iron.. 2,2'-bipyridine : A bipyridine in which the two pyridine moieties are linked by a bond between positions C-2 and C-2'.	2.6	1	0	bipyridine	chelator; ferroptosis inhibitor
2,4,6-tribromophenol [no description available]	2.15	1	0	bromophenol	environmental contaminant; fungicide; marine metabolite
3,4-dichloroisocoumarin 3,4-dichloroisocoumarin : A member of the class of isocoumarins that is isocoumarin substituted by chloro groups at positions 3 and 4. It is a serine protease inhibitor.	2.13	1	0	isocoumarins; organochlorine compound	geroprotector; serine protease inhibitor
3-methylcholanthrene Methylcholanthrene: A carcinogen that is often used in experimental cancer studies.. 3-methylcholanthrene : A pentacyclic ortho- and peri-fused polycyclic arene consisting of a dihydrocyclopenta[ij]tetraphene ring system with a methyl substituent at the 3-position.	1.97	1	0	ortho- and peri-fused polycyclic arene	aryl hydrocarbon receptor agonist; carcinogenic agent
phenytoin [no description available]	2.45	2	0	imidazolidine-2,4-dione	anticonvulsant; drug allergen; sodium channel blocker; teratogenic agent
acebutolol Acebutolol: A cardioselective beta-1 adrenergic antagonist with little effect on the bronchial receptors. The drug has stabilizing and quinidine-like effects on cardiac rhythm, as well as weak inherent sympathomimetic action.. acebutolol : An ether that is the 2-acetyl-4-(butanoylamino)phenyl ether of the primary hydroxy group of 3-(propan-2-ylamino)propane-1,2-diol.	2.04	1	0	aromatic amide; ethanolamines; ether; monocarboxylic acid amide; propanolamine; secondary amino compound	anti-arrhythmia drug; antihypertensive agent; beta-adrenergic antagonist; sympathomimetic agent
alprazolam Alprazolam: A triazolobenzodiazepine compound with antianxiety and sedative-hypnotic actions, that is efficacious in the treatment of PANIC DISORDERS, with or without AGORAPHOBIA, and in generalized ANXIETY DISORDERS. (From AMA Drug Evaluations Annual, 1994, p238). alprazolam : A member of the class of triazolobenzodiazepines that is 4H-[1,2,4]triazolo[4,3-a][1,4]benzodiazepine carrying methyl, phenyl and chloro substituents at positions 1, 6 and 8 respectively. Alprazolam is only found in individuals that have taken this drug.	2.04	1	0	organochlorine compound; triazolobenzodiazepine	anticonvulsant; anxiolytic drug; GABA agonist; muscle relaxant; sedative; xenobiotic
theophylline [no description available]	2.04	1	0	dimethylxanthine	adenosine receptor antagonist; anti-asthmatic drug; anti-inflammatory agent; bronchodilator agent; drug metabolite; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; fungal metabolite; human blood serum metabolite; immunomodulator; muscle relaxant; vasodilator agent
atenolol Atenolol: A cardioselective beta-1 adrenergic blocker possessing properties and potency similar to PROPRANOLOL, but without a negative inotropic effect.. atenolol : An ethanolamine compound having a (4-carbamoylmethylphenoxy)methyl group at the 1-position and an N-isopropyl substituent.	2.04	1	0	ethanolamines; monocarboxylic acid amide; propanolamine	anti-arrhythmia drug; antihypertensive agent; beta-adrenergic antagonist; environmental contaminant; sympatholytic agent; xenobiotic
barbital 5,5-diethylbarbituric acid : A member of the class of barbiturates, the structure of which is that of barbituric acid substituted at C-5 by two ethyl groups. Formerly used as a hypnotic (sleeping aid).	2.04	1	0	barbiturates	drug allergen
benzo(a)pyrene Benzo(a)pyrene: A potent mutagen and carcinogen. It is a public health concern because of its possible effects on industrial workers, as an environmental pollutant, an as a component of tobacco smoke.. benzo[a]pyrene : An ortho- and peri-fused polycyclic arene consisting of five fused benzene rings.	3.8	3	0	ortho- and peri-fused polycyclic arene	carcinogenic agent; mouse metabolite
betaxolol [no description available]	2.04	1	0	propanolamine	antihypertensive agent; beta-adrenergic antagonist; sympatholytic agent
biperiden Biperiden: A muscarinic antagonist that has effects in both the central and peripheral nervous systems. It has been used in the treatment of arteriosclerotic, idiopathic, and postencephalitic parkinsonism. It has also been used to alleviate extrapyramidal symptoms induced by phenothiazine derivatives and reserpine.. biperiden : A member of the class of piperidines that is N-propylpiperidine in which the methyl hydrogens have been replaced by hydroxy, phenyl, and 5-norbornen-2-yl groups. A muscarinic antagonist affecting both the central and peripheral nervous systems, it is used in the treatment of all forms of Parkinson's disease.	2.04	1	0	piperidines; tertiary alcohol; tertiary amino compound	antidote to sarin poisoning; antidyskinesia agent; antiparkinson drug; muscarinic antagonist; parasympatholytic
bisoprolol Bisoprolol: A cardioselective beta-1 adrenergic blocker. It is effective in the management of HYPERTENSION and ANGINA PECTORIS.	2.04	1	0	secondary alcohol; secondary amine	anti-arrhythmia drug; antihypertensive agent; beta-adrenergic antagonist; sympatholytic agent
verapamil Verapamil: A calcium channel blocker that is a class IV anti-arrhythmia agent.. verapamil : A racemate comprising equimolar amounts of dexverapamil and (S)-verapamil. An L-type calcium channel blocker of the phenylalkylamine class, it is used (particularly as the hydrochloride salt) in the treatment of hypertension, angina pectoris and cardiac arrhythmia, and as a preventive medication for migraine.. 2-(3,4-dimethoxyphenyl)-5-{[2-(3,4-dimethoxyphenyl)ethyl](methyl)amino}-2-(propan-2-yl)pentanenitrile : A tertiary amino compound that is 3,4-dimethoxyphenylethylamine in which the hydrogens attached to the nitrogen are replaced by a methyl group and a 4-cyano-4-(3,4-dimethoxyphenyl)-5-methylhexyl group.	2.04	1	0	aromatic ether; nitrile; polyether; tertiary amino compound
cetylpyridinium Cetylpyridinium: Cationic bactericidal surfactant used as a topical antiseptic for skin, wounds, mucous membranes, instruments, etc.; and also as a component in mouthwash and lozenges.	2.31	1	0	pyridinium ion
chlorpromazine Chlorpromazine: The prototypical phenothiazine antipsychotic drug. Like the other drugs in this class chlorpromazine's antipsychotic actions are thought to be due to long-term adaptation by the brain to blocking DOPAMINE RECEPTORS. Chlorpromazine has several other actions and therapeutic uses, including as an antiemetic and in the treatment of intractable hiccup.. chlorpromazine : A substituted phenothiazine in which the ring nitrogen at position 10 is attached to C-3 of an N,N-dimethylpropanamine moiety.	2.04	1	0	organochlorine compound; phenothiazines; tertiary amine	anticoronaviral agent; antiemetic; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; phenothiazine antipsychotic drug
ciprofloxacin Ciprofloxacin: A broad-spectrum antimicrobial carboxyfluoroquinoline.. ciprofloxacin : A quinolone that is quinolin-4(1H)-one bearing cyclopropyl, carboxylic acid, fluoro and piperazin-1-yl substituents at positions 1, 3, 6 and 7, respectively.	2.17	1	0	aminoquinoline; cyclopropanes; fluoroquinolone antibiotic; N-arylpiperazine; quinolinemonocarboxylic acid; quinolone antibiotic; quinolone; zwitterion	antibacterial drug; antiinfective agent; antimicrobial agent; DNA synthesis inhibitor; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; environmental contaminant; topoisomerase IV inhibitor; xenobiotic
clomipramine Clomipramine: A tricyclic antidepressant similar to IMIPRAMINE that selectively inhibits the uptake of serotonin in the brain. It is readily absorbed from the gastrointestinal tract and demethylated in the liver to form its primary active metabolite, desmethylclomipramine.. clomipramine : A dibenzoazepine that is 10,11-dihydro-5H-dibenzo[b,f]azepine which is substituted by chlorine at position 3 and in which the hydrogen attached to the nitrogen is replaced by a 3-(dimethylamino)propyl group. One of the more sedating tricyclic antidepressants, it is used as the hydrochloride salt for the treatment of depression as well as obsessive-compulsive disorder and phobias.	2.04	1	0	dibenzoazepine	anticoronaviral agent; antidepressant; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; serotonergic antagonist; serotonergic drug; serotonin uptake inhibitor
clotiazepam clotiazepam: was heading 1975-94 (see under AZEPINES 1978-90; was Y 6047 see under AZEPINES 1975-77); Y 6047 was see CLOTIAZEPAM 1978-94; use AZEPINES to search CLOTIAZEPAM 1975-94; thienodiazepine derivative with actions similar to those of benzodiazepines	2.04	1	0	organic molecular entity
dapi DAPI: RN given refers to parent cpd.	1.99	1	0	indoles	fluorochrome
diazepam Diazepam: A benzodiazepine with anticonvulsant, anxiolytic, sedative, muscle relaxant, and amnesic properties and a long duration of action. Its actions are mediated by enhancement of GAMMA-AMINOBUTYRIC ACID activity.. diazepam : A 1,4-benzodiazepinone that is 1,3-dihydro-2H-1,4-benzodiazepin-2-one substituted by a chloro group at position 7, a methyl group at position 1 and a phenyl group at position 5.	2.04	1	0	1,4-benzodiazepinone; organochlorine compound	anticonvulsant; anxiolytic drug; environmental contaminant; sedative; xenobiotic
dibutyl phthalate Dibutyl Phthalate: A plasticizer used in most plastics and found in water, air, soil, plants and animals. It may have some adverse effects with long-term exposure.. dibutyl phthalate : A phthalate ester that is the diester obtained by the formal condensation of the carboxy groups of phthalic acid with two molecules of butan-1-ol. Although used extensively as a plasticiser, it is a ubiquitous environmental contaminant that poses a risk to humans.	3.08	1	0	diester; phthalate ester	EC 3.2.1.20 (alpha-glucosidase) inhibitor; environmental contaminant; metabolite; plasticiser; teratogenic agent
dichlorodiphenyl dichloroethylene Dichlorodiphenyl Dichloroethylene: An organochlorine pesticide, it is the ethylene metabolite of DDT.	2.05	1	0	chlorophenylethylene; monochlorobenzenes	human xenobiotic metabolite; persistent organic pollutant
valproic acid Valproic Acid: A fatty acid with anticonvulsant and anti-manic properties that is used in the treatment of EPILEPSY and BIPOLAR DISORDER. The mechanisms of its therapeutic actions are not well understood. It may act by increasing GAMMA-AMINOBUTYRIC ACID levels in the brain or by altering the properties of VOLTAGE-GATED SODIUM CHANNELS.. valproic acid : A branched-chain saturated fatty acid that comprises of a propyl substituent on a pentanoic acid stem.	2.04	1	0	branched-chain fatty acid; branched-chain saturated fatty acid	anticonvulsant; antimanic drug; EC 3.5.1.98 (histone deacetylase) inhibitor; GABA agent; neuroprotective agent; psychotropic drug; teratogenic agent
enflurane Enflurane: An extremely stable inhalation anesthetic that allows rapid adjustments of anesthesia depth with little change in pulse or respiratory rate.. enflurane : An ether in which the oxygen atom is connected to 2-chloro-1,1,2-trifluoroethyl and difluoromethyl groups.	2.04	1	0	ether; organochlorine compound; organofluorine compound	anaesthetic
ethenzamide ethenzamide: structure	2.04	1	0	organic molecular entity
ether Ether: A mobile, very volatile, highly flammable liquid used as an inhalation anesthetic and as a solvent for waxes, fats, oils, perfumes, alkaloids, and gums. It is mildly irritating to skin and mucous membranes.. ether : An organooxygen compound with formula ROR, where R is not hydrogen.. diethyl ether : An ether in which the oxygen atom is linked to two ethyl groups.	2.04	1	0	ether; volatile organic compound	inhalation anaesthetic; non-polar solvent; refrigerant
fentanyl Fentanyl: A potent narcotic analgesic, abuse of which leads to habituation or addiction. It is primarily a mu-opioid agonist. Fentanyl is also used as an adjunct to general anesthetics, and as an anesthetic for induction and maintenance. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1078). fentanyl : A monocarboxylic acid amide resulting from the formal condensation of the aryl amino group of N-phenyl-1-(2-phenylethyl)piperidin-4-amine with propanoic acid.	2.04	1	0	anilide; monocarboxylic acid amide; piperidines	adjuvant; anaesthesia adjuvant; anaesthetic; intravenous anaesthetic; mu-opioid receptor agonist; opioid analgesic
fluoxetine Fluoxetine: The first highly specific serotonin uptake inhibitor. It is used as an antidepressant and often has a more acceptable side-effects profile than traditional antidepressants.. fluoxetine : A racemate comprising equimolar amounts of (R)- and (S)-fluoxetine. A selective serotonin reuptake inhibitor (SSRI), it is used (generally as the hydrochloride salt) for the treatment of depression (and the depressive phase of bipolar disorder), bullimia nervosa, and obsessive-compulsive disorder.. N-methyl-3-phenyl-3-[4-(trifluoromethyl)phenoxy]propan-1-amine : An aromatic ether consisting of 4-trifluoromethylphenol in which the hydrogen of the phenolic hydroxy group is replaced by a 3-(methylamino)-1-phenylpropyl group.	2.04	1	0	(trifluoromethyl)benzenes; aromatic ether; secondary amino compound
haloperidol Haloperidol: A phenyl-piperidinyl-butyrophenone that is used primarily to treat SCHIZOPHRENIA and other PSYCHOSES. It is also used in schizoaffective disorder, DELUSIONAL DISORDERS, ballism, and TOURETTE SYNDROME (a drug of choice) and occasionally as adjunctive therapy in INTELLECTUAL DISABILITY and the chorea of HUNTINGTON DISEASE. It is a potent antiemetic and is used in the treatment of intractable HICCUPS. (From AMA Drug Evaluations Annual, 1994, p279). haloperidol : A compound composed of a central piperidine structure with hydroxy and p-chlorophenyl substituents at position 4 and an N-linked p-fluorobutyrophenone moiety.	2.52	2	0	aromatic ketone; hydroxypiperidine; monochlorobenzenes; organofluorine compound; tertiary alcohol	antidyskinesia agent; antiemetic; dopaminergic antagonist; first generation antipsychotic; serotonergic antagonist
halothane [no description available]	2.04	1	0	haloalkane; organobromine compound; organochlorine compound; organofluorine compound	inhalation anaesthetic
hexobarbital Hexobarbital: A barbiturate that is effective as a hypnotic and sedative.. hexobarbital : A member of the class of barbiturates taht is barbituric acid substituted at N-1 by methyl and at C-5 by methyl and cyclohex-1-enyl groups.	2.04	1	0	barbiturates
hydroxyzine Hydroxyzine: A histamine H1 receptor antagonist that is effective in the treatment of chronic urticaria, dermatitis, and histamine-mediated pruritus. Unlike its major metabolite CETIRIZINE, it does cause drowsiness. It is also effective as an antiemetic, for relief of anxiety and tension, and as a sedative.. hydroxyzine : A N-alkylpiperazine that is piperzine in which the nitrogens atoms are substituted by 2-(2-hydroxyethoxy)ethyl and (4-chlorophenyl)(phenyl)methyl groups respectively.	2.04	1	0	hydroxyether; monochlorobenzenes; N-alkylpiperazine	anticoronaviral agent; antipruritic drug; anxiolytic drug; dermatologic drug; H1-receptor antagonist
lidocaine Lidocaine: A local anesthetic and cardiac depressant used as an antiarrhythmia agent. Its actions are more intense and its effects more prolonged than those of PROCAINE but its duration of action is shorter than that of BUPIVACAINE or PRILOCAINE.. lidocaine : The monocarboxylic acid amide resulting from the formal condensation of N,N-diethylglycine with 2,6-dimethylaniline.	2.04	1	0	benzenes; monocarboxylic acid amide; tertiary amino compound	anti-arrhythmia drug; drug allergen; environmental contaminant; local anaesthetic; xenobiotic
imipramine Imipramine: The prototypical tricyclic antidepressant. It has been used in major depression, dysthymia, bipolar depression, attention-deficit disorders, agoraphobia, and panic disorders. It has less sedative effect than some other members of this therapeutic group.. imipramine : A dibenzoazepine that is 5H-dibenzo[b,f]azepine substituted by a 3-(dimethylamino)propyl group at the nitrogen atom.	2.04	1	0	dibenzoazepine	adrenergic uptake inhibitor; antidepressant; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor
isoflurane Isoflurane: A stable, non-explosive inhalation anesthetic, relatively free from significant side effects.	2.44	2	0	organofluorine compound	inhalation anaesthetic
2-propanol 2-Propanol: An isomer of 1-PROPANOL. It is a colorless liquid having disinfectant properties. It is used in the manufacture of acetone and its derivatives and as a solvent. Topically, it is used as an antiseptic.. propan-2-ol : A secondary alcohol that is propane in which one of the hydrogens attached to the central carbon is substituted by a hydroxy group.	2.04	1	0	secondary alcohol; secondary fatty alcohol	protic solvent
lorazepam Lorazepam: A benzodiazepine used as an anti-anxiety agent with few side effects. It also has hypnotic, anticonvulsant, and considerable sedative properties and has been proposed as a preanesthetic agent.	2.04	1	0	benzodiazepine
mechlorethamine nitrogen mustard : Compounds having two beta-haloalkyl groups bound to a nitrogen atom, as in (X-CH2-CH2)2NR.	2.36	2	0	nitrogen mustard; organochlorine compound	alkylating agent
methoxyflurane Methoxyflurane: An inhalation anesthetic. Currently, methoxyflurane is rarely used for surgical, obstetric, or dental anesthesia. If so employed, it should be administered with NITROUS OXIDE to achieve a relatively light level of anesthesia, and a neuromuscular blocking agent given concurrently to obtain the desired degree of muscular relaxation. (From AMA Drug Evaluations Annual, 1994, p180). methoxyflurane : An ether in which the two groups attached to the central oxygen atom are methyl and 2,2-dichloro-1,1-difluoroethyl.	2.04	1	0	ether; organochlorine compound; organofluorine compound	hepatotoxic agent; inhalation anaesthetic; nephrotoxic agent; non-narcotic analgesic
methyl methanesulfonate [no description available]	1.97	1	0	methanesulfonate ester	alkylating agent; apoptosis inducer; carcinogenic agent; genotoxin; mutagen
methylphenidate Methylphenidate: A central nervous system stimulant used most commonly in the treatment of ATTENTION DEFICIT DISORDER in children and for NARCOLEPSY. Its mechanisms appear to be similar to those of DEXTROAMPHETAMINE. The d-isomer of this drug is referred to as DEXMETHYLPHENIDATE HYDROCHLORIDE.. methylphenidate : A racemate comprising equimolar amounts of the two threo isomers of methyl phenyl(piperidin-2-yl)acetate. A central stimulant and indirect-acting sympathomimetic, is used (generally as the hydrochloride salt) in the treatment of hyperactivity disorders in children and for the treatment of narcolepsy.. methyl phenyl(piperidin-2-yl)acetate : A amino acid ester that is methyl phenylacetate in which one of the hydrogens alpha to the carbonyl group is replaced by a piperidin-2-yl group.	2.04	1	0	beta-amino acid ester; methyl ester; piperidines
metoprolol Metoprolol: A selective adrenergic beta-1 blocking agent that is commonly used to treat ANGINA PECTORIS; HYPERTENSION; and CARDIAC ARRHYTHMIAS.. metoprolol : A propanolamine that is 1-(propan-2-ylamino)propan-2-ol substituted by a 4-(2-methoxyethyl)phenoxy group at position 1.	2.04	1	0	aromatic ether; propanolamine; secondary alcohol; secondary amino compound	antihypertensive agent; beta-adrenergic antagonist; environmental contaminant; geroprotector; xenobiotic
midazolam Midazolam: A short-acting hypnotic-sedative drug with anxiolytic and amnestic properties. It is used in dentistry, cardiac surgery, endoscopic procedures, as preanesthetic medication, and as an adjunct to local anesthesia. The short duration and cardiorespiratory stability makes it useful in poor-risk, elderly, and cardiac patients. It is water-soluble at pH less than 4 and lipid-soluble at physiological pH.. midazolam : An imidazobenzodiazepine that is 4H-imidazo[1,5-a][1,4]benzodiazepine which is substituted by a methyl, 2-fluorophenyl and chloro groups at positions 1, 6 and 8, respectively.	2.04	1	0	imidazobenzodiazepine; monofluorobenzenes; organochlorine compound	anticonvulsant; antineoplastic agent; anxiolytic drug; apoptosis inducer; central nervous system depressant; GABAA receptor agonist; general anaesthetic; muscle relaxant; sedative
nalidixic acid [no description available]	2.04	1	0	1,8-naphthyridine derivative; monocarboxylic acid; quinolone antibiotic	antibacterial drug; antimicrobial agent; DNA synthesis inhibitor
nitrazepam Nitrazepam: A benzodiazepine derivative used as an anticonvulsant and hypnotic.. nitrazepam : A 1,4-benzodiazepinone that is 1,3-dihydro-2H-1,4-benzodiazepin-2-one which is substituted at positions 5 and 7 by phenyl and nitro groups, respectively. It is used as a hypnotic for the short-term management of insomnia and for the treatment of epileptic spasms in infants (West's syndrome).	2.04	1	0	1,4-benzodiazepinone; C-nitro compound	anticonvulsant; antispasmodic drug; drug metabolite; GABA modulator; sedative
o(6)-benzylguanine O(6)-benzylguanine: a suicide inhibitor of O(6)-methylguanine-DNA methyltransferase activity	2.08	1	0
oxazepam Oxazepam: A benzodiazepine used in the treatment of anxiety, alcohol withdrawal, and insomnia.. oxazepam : A 1,4-benzodiazepinone that is 1,3-dihydro-2H-1,4-benzodiazepin-2-one substituted by a chloro group at position 7, a hydroxy group at position 3 and phenyl group at position 5.	3.1	1	0	1,4-benzodiazepinone; organochlorine compound	anxiolytic drug; environmental contaminant; xenobiotic
oxprenolol Oxprenolol: A beta-adrenergic antagonist used in the treatment of hypertension, angina pectoris, arrhythmias, and anxiety.	2.04	1	0	aromatic ether
quinone benzoquinone : The simplest members of the class of benzoquinones, consisting of cyclohexadiene which is substituted by two oxo groups.. 1,4-benzoquinone : The simplest member of the class of 1,4-benzoquinones, obtained by the formal oxidation of hydroquinone to the corresponding diketone. It is a metabolite of benzene.. quinone : Compounds having a fully conjugated cyclic dione structure, such as that of benzoquinones, derived from aromatic compounds by conversion of an even number of -CH= groups into -C(=O)- groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included).	1.92	1	0	1,4-benzoquinones	cofactor; human xenobiotic metabolite; mouse metabolite
4-dichlorobenzene dichlorobenzene : Any member of the class of chlorobenzenes carrying two chloro groups at unspecified positions.. 1,4-dichlorobenzene : A dichlorobenzene carrying chloro groups at positions 1 and 4.	2.75	3	0	dichlorobenzene	insecticide
phenobarbital Phenobarbital: A barbituric acid derivative that acts as a nonselective central nervous system depressant. It potentiates GAMMA-AMINOBUTYRIC ACID action on GABA-A RECEPTORS, and modulates chloride currents through receptor channels. It also inhibits glutamate induced depolarizations.. phenobarbital : A member of the class of barbiturates, the structure of which is that of barbituric acid substituted at C-5 by ethyl and phenyl groups.	2.67	3	0	barbiturates	anticonvulsant; drug allergen; excitatory amino acid antagonist; sedative
phenolphthalein Phenolphthalein: An acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic.	3.51	2	0	phenols
pindolol Pindolol: A moderately lipophilic beta blocker (ADRENERGIC BETA-ANTAGONISTS). It is non-cardioselective and has intrinsic sympathomimetic actions, but little membrane-stabilizing activity. (From Martindale, The Extra Pharmocopoeia, 30th ed, p638). pindolol : A member of the class of indols which is the 2-hydroxy-3-(isopropylamino)propyl ether derivative of 1H-indol-4-ol.	2.04	1	0	indoles; secondary amine	antiglaucoma drug; antihypertensive agent; beta-adrenergic antagonist; serotonergic antagonist; vasodilator agent
potassium chloride Potassium Chloride: A white crystal or crystalline powder used in BUFFERS; FERTILIZERS; and EXPLOSIVES. It can be used to replenish ELECTROLYTES and restore WATER-ELECTROLYTE BALANCE in treating HYPOKALEMIA.. potassium chloride : A metal chloride salt with a K(+) counterion.	1.98	1	0	inorganic chloride; inorganic potassium salt; potassium salt	fertilizer
practolol Practolol: A beta-1 adrenergic antagonist that has been used in the emergency treatment of CARDIAC ARRYTHMIAS.. practolol : N-(4-Hydroxyphenyl)acetamide in which the hydrogen of the phenolic hydroxy group is substituted by a 3-(isopropylaminoamino)-2-hydroxypropyl group. A selective beta blocker, it has been used in the emergency treatment of cardiac arrhythmias.	2.04	1	0	acetamides; ethanolamines; propanolamine; secondary alcohol; secondary amino compound	anti-arrhythmia drug; beta-adrenergic antagonist
procaine Procaine: A local anesthetic of the ester type that has a slow onset and a short duration of action. It is mainly used for infiltration anesthesia, peripheral nerve block, and spinal block. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1016).. procaine : A benzoate ester, formally the result of esterification of 4-aminobenzoic acid with 2-diethylaminoethanol but formed experimentally by reaction of ethyl 4-aminobenzoate with 2-diethylaminoethanol.	3.03	1	0	benzoate ester; substituted aniline; tertiary amino compound	central nervous system depressant; drug allergen; local anaesthetic; peripheral nervous system drug
propranolol Propranolol: A widely used non-cardioselective beta-adrenergic antagonist. Propranolol has been used for MYOCARDIAL INFARCTION; ARRHYTHMIA; ANGINA PECTORIS; HYPERTENSION; HYPERTHYROIDISM; MIGRAINE; PHEOCHROMOCYTOMA; and ANXIETY but adverse effects instigate replacement by newer drugs.. propranolol : A propanolamine that is propan-2-ol substituted by a propan-2-ylamino group at position 1 and a naphthalen-1-yloxy group at position 3.	2.04	1	0	naphthalenes; propanolamine; secondary amine	anti-arrhythmia drug; antihypertensive agent; anxiolytic drug; beta-adrenergic antagonist; environmental contaminant; human blood serum metabolite; vasodilator agent; xenobiotic
sevoflurane Sevoflurane: A non-explosive inhalation anesthetic used in the induction and maintenance of general anesthesia. It does not cause respiratory irritation and may also prevent PLATELET AGGREGATION.. sevoflurane : An ether compound having fluoromethyl and 1,1,1,3,3,3-hexafluoroisopropyl as the two alkyl groups.	2.04	1	0	ether; organofluorine compound	central nervous system depressant; inhalation anaesthetic; platelet aggregation inhibitor
sulfasalazine Sulfasalazine: A drug that is used in the management of inflammatory bowel diseases. Its activity is generally considered to lie in its metabolic breakdown product, 5-aminosalicylic acid (see MESALAMINE) released in the colon. (From Martindale, The Extra Pharmacopoeia, 30th ed, p907). sulfasalazine : An azobenzene consisting of diphenyldiazene having a carboxy substituent at the 4-position, a hydroxy substituent at the 3-position and a 2-pyridylaminosulphonyl substituent at the 4'-position.	2.05	1	0
sulfisoxazole Sulfisoxazole: A short-acting sulfonamide antibacterial with activity against a wide range of gram- negative and gram-positive organisms.. sulfisoxazole : A sulfonamide antibacterial with an oxazole substituent. It has antibiotic activity against a wide range of gram-negative and gram-positive organisms.	2.05	1	0	isoxazoles; sulfonamide antibiotic; sulfonamide	antibacterial drug; drug allergen
tegafur [no description available]	2.04	1	0	organohalogen compound; pyrimidines
thioridazine Thioridazine: A phenothiazine antipsychotic used in the management of PHYCOSES, including SCHIZOPHRENIA.. thioridazine : A phenothiazine derivative having a methylsulfanyl subsitituent at the 2-position and a (1-methylpiperidin-2-yl)ethyl] group at the N-10 position.	2.04	1	0	phenothiazines; piperidines	alpha-adrenergic antagonist; dopaminergic antagonist; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; first generation antipsychotic; H1-receptor antagonist; serotonergic antagonist
tolbutamide Tolbutamide: A sulphonylurea hypoglycemic agent with actions and uses similar to those of CHLORPROPAMIDE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p290). tolbutamide : An N-sulfonylurea that consists of 1-butylurea having a tosyl group attached at the 3-position.	2.04	1	0	N-sulfonylurea	human metabolite; hypoglycemic agent; insulin secretagogue; potassium channel blocker
trifluoperazine [no description available]	2.04	1	0	N-alkylpiperazine; N-methylpiperazine; organofluorine compound; phenothiazines	antiemetic; calmodulin antagonist; dopaminergic antagonist; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor; EC 5.3.3.5 (cholestenol Delta-isomerase) inhibitor; phenothiazine antipsychotic drug
trifluralin Trifluralin: A microtubule-disrupting pre-emergence herbicide.. trifluralin : A substituted aniline that is N,N-dipropylaniline substituted by a nitro groups at positions 2 and 6 and a trifluoromethyl group at position 4. It is an agrochemical used as a pre-emergence herbicide.	2.05	1	0	(trifluoromethyl)benzenes; C-nitro compound; substituted aniline	agrochemical; environmental contaminant; herbicide; xenobiotic
trihexyphenidyl Trihexyphenidyl: One of the centrally acting MUSCARINIC ANTAGONISTS used for treatment of PARKINSONIAN DISORDERS and drug-induced extrapyramidal movement disorders and as an antispasmodic.	2.04	1	0	amine
urethane [no description available]	4.85	4	0	carbamate ester	fungal metabolite; mutagen
zopiclone zopiclone: S(+)-enantiomer of racemic zopiclone; azabicyclo(4.3.0)nonane; a nonbenzodiazepine; one of the so-called of Z drugs (zopiclone, eszopiclone, zolpidem, and zaleplon) for which there is some correlation with tumors; was term of zopiclone 2004-2007. zopiclone : A pyrrolo[3,4-b]pyrazine compound having a 4-methylpiperazine-1-carboxyl group at the 5-position, a 5-chloropyridin-2-yl group at the 6-position and an oxo-substituent at the 7-position.	2.13	1	0	monochloropyridine; pyrrolopyrazine	central nervous system depressant; sedative
mitomycin Mitomycin: An antineoplastic antibiotic produced by Streptomyces caespitosus. It is one of the bi- or tri-functional ALKYLATING AGENTS causing cross-linking of DNA and inhibition of DNA synthesis.. mitomycin : A family of aziridine-containing natural products isolated from Streptomyces caespitosus or Streptomyces lavendulae.	2.67	3	0	mitomycin	alkylating agent; antineoplastic agent
triethylenemelamine Triethylenemelamine: Toxic alkylating agent used in industry; also as antineoplastic and research tool to produce chromosome aberrations and cancers.	2.36	2	0	1,3,5-triazines	alkylating agent; insect sterilant
spironolactone Spironolactone: A potassium sparing diuretic that acts by antagonism of aldosterone in the distal renal tubules. It is used mainly in the treatment of refractory edema in patients with congestive heart failure, nephrotic syndrome, or hepatic cirrhosis. Its effects on the endocrine system are utilized in the treatments of hirsutism and acne but they can lead to adverse effects. (From Martindale, The Extra Pharmacopoeia, 30th ed, p827). spironolactone : A steroid lactone that is 17alpha-pregn-4-ene-21,17-carbolactone substituted by an oxo group at position 3 and an alpha-acetylsulfanyl group at position 7.	2	1	0	3-oxo-Delta(4) steroid; oxaspiro compound; steroid lactone; thioester	aldosterone antagonist; antihypertensive agent; diuretic; environmental contaminant; xenobiotic
carbon tetrachloride Carbon Tetrachloride: A solvent for oils, fats, lacquers, varnishes, rubber waxes, and resins, and a starting material in the manufacturing of organic compounds. Poisoning by inhalation, ingestion or skin absorption is possible and may be fatal. (Merck Index, 11th ed). tetrachloromethane : A chlorocarbon that is methane in which all the hydrogens have been replaced by chloro groups.	2.05	1	0	chlorocarbon; chloromethanes	hepatotoxic agent; refrigerant
lysine Lysine: An essential amino acid. It is often added to animal feed.. lysine : A diamino acid that is caproic (hexanoic) acid bearing two amino substituents at positions 2 and 6.. L-lysine : An L-alpha-amino acid; the L-isomer of lysine.	3.54	2	0	aspartate family amino acid; L-alpha-amino acid zwitterion; L-alpha-amino acid; lysine; organic molecular entity; proteinogenic amino acid	algal metabolite; anticonvulsant; Escherichia coli metabolite; human metabolite; micronutrient; mouse metabolite; nutraceutical; plant metabolite; Saccharomyces cerevisiae metabolite
cyanides Cyanides: Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It is distinguished from NITRILES, which denotes organic compounds containing the -CN radical.. cyanides : Salts and C-organyl derivatives of hydrogen cyanide, HC#N.. isocyanide : The isomer HN(+)#C(-) of hydrocyanic acid, HC#N, and its hydrocarbyl derivatives RNC (RN(+)#C(-)).. cyanide : A pseudohalide anion that is the conjugate base of hydrogen cyanide.	2.15	1	0	pseudohalide anion	EC 1.9.3.1 (cytochrome c oxidase) inhibitor
9,10-dimethyl-1,2-benzanthracene 9,10-Dimethyl-1,2-benzanthracene: Polycyclic aromatic hydrocarbon found in tobacco smoke that is a potent carcinogen.. 7,12-dimethyltetraphene : A tetraphene having methyl substituents at the 7- and 12-positions. It is a potent carcinogen and is present in tobacco smoke.	1.97	1	0	ortho-fused polycyclic arene; tetraphenes	carcinogenic agent
aminopyrine Aminopyrine: A pyrazolone with analgesic, anti-inflammatory, and antipyretic properties but has risk of AGRANULOCYTOSIS. A breath test with 13C-labeled aminopyrine has been used as a non-invasive measure of CYTOCHROME P-450 metabolic activity in LIVER FUNCTION TESTS.. aminophenazone : A pyrazolone that is 1,2-dihydro-3H-pyrazol-3-one substituted by a dimethylamino group at position 4, methyl groups at positions 1 and 5 and a phenyl group at position 2. It exhibits analgesic, anti-inflammatory, and antipyretic properties.	3.03	1	0	pyrazolone; tertiary amino compound	antipyretic; environmental contaminant; non-narcotic analgesic; non-steroidal anti-inflammatory drug; xenobiotic
carbostyril Quinolones: A group of derivatives of naphthyridine carboxylic acid, quinoline carboxylic acid, or NALIDIXIC ACID.. quinolin-2(1H)-one : A quinolone that is 1,2-dihydroquinoline substituted by an oxo group at position 2.	2.71	3	0	monohydroxyquinoline; quinolone	bacterial xenobiotic metabolite
levodopa Levodopa: The naturally occurring form of DIHYDROXYPHENYLALANINE and the immediate precursor of DOPAMINE. Unlike dopamine itself, it can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to DOPAMINE. It is used for the treatment of PARKINSONIAN DISORDERS and is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system.. L-dopa : An optically active form of dopa having L-configuration. Used to treat the stiffness, tremors, spasms, and poor muscle control of Parkinson's disease	2.21	1	0	amino acid zwitterion; dopa; L-tyrosine derivative; non-proteinogenic L-alpha-amino acid	allelochemical; antidyskinesia agent; antiparkinson drug; dopaminergic agent; hapten; human metabolite; mouse metabolite; neurotoxin; plant growth retardant; plant metabolite; prodrug
tyrosine Tyrosine: A non-essential amino acid. In animals it is synthesized from PHENYLALANINE. It is also the precursor of EPINEPHRINE; THYROID HORMONES; and melanin.. tyrosine : An alpha-amino acid that is phenylalanine bearing a hydroxy substituent at position 4 on the phenyl ring.	2.21	1	0	amino acid zwitterion; erythrose 4-phosphate/phosphoenolpyruvate family amino acid; L-alpha-amino acid; proteinogenic amino acid; tyrosine	EC 1.3.1.43 (arogenate dehydrogenase) inhibitor; fundamental metabolite; micronutrient; nutraceutical
adenosine monophosphate Adenosine Monophosphate: Adenine nucleotide containing one phosphate group esterified to the sugar moiety in the 2'-, 3'-, or 5'-position.	1.98	1	0	adenosine 5'-phosphate; purine ribonucleoside 5'-monophosphate	adenosine A1 receptor agonist; cofactor; EC 3.1.3.1 (alkaline phosphatase) inhibitor; EC 3.1.3.11 (fructose-bisphosphatase) inhibitor; fundamental metabolite; micronutrient; nutraceutical
ethyl methanesulfonate Ethyl Methanesulfonate: An antineoplastic agent with alkylating properties. It also acts as a mutagen by damaging DNA and is used experimentally for that effect.. ethyl methanesulfonate : A methanesulfonate ester resulting from the formal condensation of methanesulfonic acid with ethanol.	1.97	1	0	methanesulfonate ester	alkylating agent; antineoplastic agent; carcinogenic agent; genotoxin; mutagen; teratogenic agent
phenylalanine Phenylalanine: An essential aromatic amino acid that is a precursor of MELANIN; DOPAMINE; noradrenalin (NOREPINEPHRINE), and THYROXINE.. L-phenylalanine : The L-enantiomer of phenylalanine.. phenylalanine : An aromatic amino acid that is alanine in which one of the methyl hydrogens is substituted by a phenyl group.	2.5	2	0	amino acid zwitterion; erythrose 4-phosphate/phosphoenolpyruvate family amino acid; L-alpha-amino acid; phenylalanine; proteinogenic amino acid	algal metabolite; EC 3.1.3.1 (alkaline phosphatase) inhibitor; Escherichia coli metabolite; human xenobiotic metabolite; micronutrient; mouse metabolite; nutraceutical; plant metabolite; Saccharomyces cerevisiae metabolite
colchicine (S)-colchicine : A colchicine that has (S)-configuration. It is a secondary metabolite, has anti-inflammatory properties and is used to treat gout, crystal-induced joint inflammation, familial Mediterranean fever, and many other conditions.	1.97	1	0	alkaloid; colchicine	anti-inflammatory agent; gout suppressant; mutagen
chloroform Chloroform: A commonly used laboratory solvent. It was previously used as an anesthetic, but was banned from use in the U.S. due to its suspected carcinogenicity.. chloroform : A one-carbon compound that is methane in which three of the hydrogens are replaced by chlorines.	4.03	5	0	chloromethanes; one-carbon compound	carcinogenic agent; central nervous system drug; inhalation anaesthetic; non-polar solvent; refrigerant
hexachloroethane [no description available]	2.05	1	0	chlorocarbon; chloroethanes	carcinogenic agent; refrigerant
dimethylformamide Dimethylformamide: A formamide in which the amino hydrogens are replaced by methyl groups.. N,N-dimethylformamide : A member of the class of formamides that is formamide in which the amino hydrogens are replaced by methyl groups.	2.6	1	0	formamides; volatile organic compound	geroprotector; hepatotoxic agent; polar aprotic solvent
n-pentanol n-pentanol: RN given refers to parent cpd. pentan-1-ol : A short-chain primary fatty alcohol that is pentane in which a hydrogen of one of the methyl groups is substituted by a hydroxy group. It has been isolated from Melicope ptelefolia.	2.15	1	0	pentanol; short-chain primary fatty alcohol	human metabolite; plant metabolite
1,1,1-trichloroethane Trichloroethanes: Chlorinated ethanes which are used extensively as industrial solvents. They have been utilized in numerous home-use products including spot remover preparations and inhalant decongestant sprays. These compounds cause central nervous system and cardiovascular depression and are hepatotoxic. Include 1,1,1- and 1,1,2-isomers.. 1,1,1-trichloroethane : A member of the class of chloroethanes carrying three chloro substituents at position 1.	2.04	1	0	chloroethanes	polar solvent
valine Valine: A branched-chain essential amino acid that has stimulant activity. It promotes muscle growth and tissue repair. It is a precursor in the penicillin biosynthetic pathway.. valine : A branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by an isopropyl group.. L-valine : The L-enantiomer of valine.	3.89	12	0	L-alpha-amino acid zwitterion; L-alpha-amino acid; proteinogenic amino acid; pyruvate family amino acid; valine	algal metabolite; Escherichia coli metabolite; human metabolite; micronutrient; mouse metabolite; nutraceutical; Saccharomyces cerevisiae metabolite
perthane perthane: structure	2.05	1	0
ethane Ethane: A two carbon alkane with the formula H3C-CH3.. ethane : An alkane comprising of two carbon atoms.	2.04	1	0	alkane; gas molecular entity	plant metabolite; refrigerant
ethylene Plastipore: high density polyethylene sponge biocompatible material; used as posts in dental bridges	3.96	13	0	alkene; gas molecular entity	plant hormone; refrigerant
acetylene [no description available]	2.66	3	0	alkyne; gas molecular entity; terminal acetylenic compound
boranes Boranes: The collective name for the boron hydrides, which are analogous to the alkanes and silanes. Numerous boranes are known. Some have high calorific values and are used in high-energy fuels. (From Grant & Hackh's Chemical Dictionary, 5th ed). borane : The simplest borane, consisting of a single boron atom carrying three hydrogens.. boranes : The molecular hydrides of boron.	2.06	1	0	boranes; mononuclear parent hydride
propane Propane: A three carbon alkane with the formula H3CCH2CH3.	2.05	1	0	alkane; gas molecular entity	food propellant
methylacetylene methylacetylene: structure	1.93	1	0	alkyne; gas molecular entity; terminal acetylenic compound
ethyl chloride Ethyl Chloride: A gas that condenses under slight pressure. Because of its low boiling point ethyl chloride sprayed on skin produces an intense cold by evaporation. Cold blocks nerve conduction. Ethyl chloride has been used in surgery but is primarily used to relieve local pain in sports medicine.. chloroethane : The simplest and least toxic member of the class of chloroethanes, that is ethane in which a single hydrogen is substituted by a chlorine. A colourless gas at room temperature and pressure (boiling point 12degreeC), it is used as a mild topical anaesthetic to numb the skin prior to ear piercing, skin biopsies, etc., and is also used in the treatment of sports injuries. It was formerly used in the production of tetraethyllead.	2.05	1	0	chloroethanes	antipruritic drug; inhalation anaesthetic; local anaesthetic
vinyl chloride Vinyl Chloride: A gas that has been used as an aerosol propellant and is the starting material for polyvinyl resins. Toxicity studies have shown various adverse effects, particularly the occurrence of liver neoplasms.. chloroethene : A monohaloethene that is ethene in which one of the hydrogens has been replaced by a chloro group.	10.03	7	0	chloroethenes; gas molecular entity; monohaloethene	carcinogenic agent
vinyl fluoride [no description available]	7.03	1	0	gas molecular entity; monohaloethene
methylene chloride Methylene Chloride: A chlorinated hydrocarbon that has been used as an inhalation anesthetic and acts as a narcotic in high concentrations. Its primary use is as a solvent in manufacturing and food technology.. dichloromethane : A member of the class of chloromethanes that is methane in which two of the hydrogens have been replaced by chlorine. A dense, non-flammible colourless liquid at room temperature (b.p. 40degreeC, d = 1.33) which is immiscible with water, it is widely used as a solvent, a paint stripper, and for the removal of caffeine from coffee and tea.	2.45	2	0	chloromethanes; volatile organic compound	carcinogenic agent; polar aprotic solvent; refrigerant
isocyanic acid isocyanic acid: structure. isocyanic acid : A colourless, volatile, poisonous inorganic compound with the formula HNCO; the simplest stable chemical compound that contains carbon, hydrogen, nitrogen, and oxygen, the four most commonly-found elements in organic chemistry and biology.	2.06	1	0	hydracid; one-carbon compound
cyclopropane cyclopropane : A cycloalkane composed of three carbon atoms to form a ring.	2.68	3	0	cycloalkane; cyclopropanes	inhalation anaesthetic
ethylene oxide Ethylene Oxide: A colorless and flammable gas at room temperature and pressure. Ethylene oxide is a bactericidal, fungicidal, and sporicidal disinfectant. It is effective against most micro-organisms, including viruses. It is used as a fumigant for foodstuffs and textiles and as an agent for the gaseous sterilization of heat-labile pharmaceutical and surgical materials. (From Reynolds, Martindale The Extra Pharmacopoeia, 30th ed, p794). oxirane : A saturated organic heteromonocyclic parent that is a three-membered heterocycle of two carbon atoms and one oxygen atom.	4.81	10	0	gas molecular entity; oxacycle; saturated organic heteromonocyclic parent	allergen; mouse metabolite; mutagen
bromodichloromethane bromodichloromethane: RN given refers to parent cpd. bromodichloromethane : A halomethane that is dichloromethane in which oneof the hydrogens has been replaced by a bromine atom. It occurs as a contaminant in drinking water.	2.05	1	0	halomethane	environmental contaminant; reagent
vinylidene chloride vinylidene chloride: potent hepatotoxin. 1,1-dichloroethene : A member of the class of chloroethenes that is ethene in which both of the hydrogens attached to one of the carbons are replaced by chlorines.	1.97	1	0	chloroethenes	carcinogenic agent; mouse metabolite; mutagen
propylene oxide propylene oxide: structure. 1,2-epoxypropane : An epoxide that is oxirane substituted by a methyl group at position 2.	2.44	2	0	epoxide
1,1,1-trifluoro-2-chloroethane 1,1,1-trifluoro-2-chloroethane: volatile metabolite of halothane	2.04	1	0	organofluorine compound
pentachloroethane [no description available]	2.05	1	0	chloroethanes	non-polar solvent
phencyclidine Phencyclidine: A hallucinogen formerly used as a veterinary anesthetic, and briefly as a general anesthetic for humans. Phencyclidine is similar to KETAMINE in structure and in many of its effects. Like ketamine, it can produce a dissociative state. It exerts its pharmacological action through inhibition of NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE). As a drug of abuse, it is known as PCP and Angel Dust.. phencyclidine : A member of the class of piperidines that is piperidine in which the nitrogen is substituted with a 1-phenylcyclohexyl group. Formerly used as an anaesthetic agent, it exhibits both hallucinogenic and neurotoxic effects.	2.49	2	0	benzenes; piperidines	anaesthetic; neurotoxin; NMDA receptor antagonist; psychotropic drug
butobarbital butobarbital: Butobarbital should be distinguished from Butabarbital (a synonym for Secbutabarbital)	2.04	1	0	barbiturates
divinyl sulfone divinyl sulfone: cross-linking reagent for agarose gels. divinyl sulfone : A sulfone compound having two S-vinyl substituents.	1.92	1	0	sulfone	cross-linking reagent
isoprene isoprene: used in manufacture of ''synthetic'' rubber, butyl rubber; copolymer in production of elastomers; structure. isoprene : A hemiterpene with the formula CH2=C(CH3)CH=CH2; the monomer of natural rubber and a common structure motif to the isoprenoids, a large class of other naturally occurring compounds.	8.58	74	0	alkadiene; hemiterpene; volatile organic compound	plant metabolite
isobutyl alcohol isobutyl alcohol: RN given refers to parent cpd	2.04	1	0	alkyl alcohol; primary alcohol	Saccharomyces cerevisiae metabolite
methylethyl ketone methylethyl ketone: solvent; colorless synthetic resins, smokeless powders; may be irritating to eyes, mucous membranes; may be toxic in high concentrations; structure. butanone : Any ketone that is butane substituted by an oxo group at unspecified position.. butan-2-one : A dialkyl ketone that is a four-carbon ketone carrying a single keto- group at position C-2.	2.46	2	0	butanone; dialkyl ketone; methyl ketone; volatile organic compound	bacterial metabolite; polar aprotic solvent
3-buten-2-one buten-2-one : A methyl ketone that is butan-2-one with an unsaturation at position 3.	2.01	1	0	enone; methyl ketone
1,1,2-trichloroethane 1,1,2-trichloroethane: RN given refers to cpd with locants as specified. 1,1,2-trichloroethane : A member of the class of chloroethanes that is ethane substituted by chloro groups at positions 1, 1 and 2.	2.05	1	0	chloroethanes
trichloroethylene Trichloroethylene: A highly volatile inhalation anesthetic used mainly in short surgical procedures where light anesthesia with good analgesia is required. It is also used as an industrial solvent. Prolonged exposure to high concentrations of the vapor can lead to cardiotoxicity and neurological impairment.. triol : A chemical compound containing three hydroxy groups.	4.05	4	0	chloroethenes	inhalation anaesthetic; mouse metabolite
acrylamide [no description available]	9.55	4	0	acrylamides; N-acylammonia; primary carboxamide	alkylating agent; carcinogenic agent; Maillard reaction product; mutagen; neurotoxin
acrylic acid acrylic acid: RN given refers to parent cpd. acrylic acid : A alpha,beta-unsaturated monocarboxylic acid that is ethene substituted by a carboxy group.	7.76	3	0	alpha,beta-unsaturated monocarboxylic acid	metabolite
1,1,2,2-tetrachloroethane 1,1,2,2-tetrachloroethane: see also record for tetrachloroethane. 1,1,2,2-tetrachloroethane : A member of the class of chloroethanes that is ethane substituted by chloro groups at positions 1, 1, 2 and 2.	2.05	1	0	chloroethanes
tetrabromobisphenol a tetrabromobisphenol A: a brominated flame retardant. 3,3',5,5'-tetrabromobisphenol A : A bromobisphenol that is 4,4'-methanediyldiphenol in which the methylene hydrogens are replaced by two methyl groups and the phenyl rings are substituted by bromo groups at positions 2, 2', 6 and 6'. It is a brominated flame retardant.	2.15	1	0	brominated flame retardant; bromobisphenol
methylmethacrylate Methylmethacrylate: The methyl ester of methacrylic acid. It polymerizes easily to form POLYMETHYL METHACRYLATE. It is used as a bone cement.. methyl methacrylate : An enoate ester having methacrylic acid as the carboxylic acid component and methanol as the alcohol component.	2.41	1	0	enoate ester; methyl ester	allergen; polymerisation monomer
1-amino-2,4-dibromoanthraquinone 1-amino-2,4-dibromoanthraquinone: intermediate in the production of dyes	2.05	1	0	anthraquinone
penicillin v Penicillin V: A broad-spectrum penicillin antibiotic used orally in the treatment of mild to moderate infections by susceptible gram-positive organisms.. phenoxymethylpenicillin : A penicillin compound having a 6beta-(phenoxyacetyl)amino side-chain.	2.04	1	0	penicillin allergen; penicillin
hexachlorobutadiene hexachlorobutadiene: a potent nephrotoxicant in rats; structure	1.93	1	0	organochlorine compound
n-vinyl-2-pyrrolidinone N-vinyl-2-pyrrolidinone: monomer of POVIDONE; structure given in first source	2.17	1	0	pyrrolidin-2-ones
michler's ketone [no description available]	2.05	1	0	benzophenones
2-naphthylamine 2-Naphthylamine: A naphthalene derivative with carcinogenic action.. 2-naphthylamine : A naphthylamine carrying the amino group at position 2.	2.98	1	0	naphthylamine	carcinogenic agent
diphenyl diphenyl: RN given refers to unlabeled cpd; structure	7.06	1	0	aromatic fungicide; benzenes; biphenyls	antifungal agrochemical; antimicrobial food preservative
4-biphenylamine 4-biphenylamine: used in detection of sulfates, & as a carcinogen in cancer research; RN given refers to parent cpd; structure. biphenyl-4-amine : An aminobiphenyl that is biphenyl substituted by an amino group at position 4.	2.98	1	0	aminobiphenyl	carcinogenic agent
styrene glycol styrene glycol: RN given refers to cpd without isomeric designation	2.05	1	0	benzenes
cdec CDEC: structure	2.05	1	0	thiocarbonyl compound
2-xylene 2-xylene: RN given refers to parent cpd. o-xylene : A xylene substituted by methyl groups at positions 1 and 2.	2.73	3	0	xylene
2-toluidine 2-toluidine: RN given refers to parent cpd. o-toluidine : An aminotoluene in which the amino substituent is ortho to the methyl group.	3.34	2	0	aminotoluene	carcinogenic agent
2,4-diaminotoluene 2,4-diaminotoluene: RN given refers to unlabeled parent cpd; structure. 2,4-diaminotoluene : An aminotoluene that is para-toluidine with an additional amino group at position 2.	2.05	1	0	aminotoluene	metabolite
4-chloro-1,2-diaminobenzene 4-chloro-1,2-diaminobenzene: RN given refers to parent cpd	2.05	1	0	monochlorobenzenes
dilactide dilactide: structure given in first source	2.05	1	0	dioxanes
styrene oxide styrene oxide: structure. styrene oxide : An epoxide that is oxirane in which one of the hydrogens has been replaced by a phenyl group.	1.99	1	0	epoxide	human xenobiotic metabolite
3-methylpentane 3-methylpentane : An alkane that is pentane which is substituted by a methyl group at position 3. It is used as a solvent in organic synthesis, as a lubricant and as a raw material for producing carbon black.	2.04	1	0	alkane; volatile organic compound	allelochemical; human metabolite; non-polar solvent
1,2,3-trichloropropane [no description available]	2.05	1	0	organochlorine compound
methylcyclopentane methylcyclopentane: toxic; RN 96-37-7. methylcyclopentane : A cycloalkane that is cyclopentane substituted by a single methyl group.	2.04	1	0	cycloalkane; volatile organic compound	human metabolite; plant metabolite
4-butyrolactone 4-Butyrolactone: One of the FURANS with a carbonyl thereby forming a cyclic lactone. It is an endogenous compound made from gamma-aminobutyrate and is the precursor of gamma-hydroxybutyrate. It is also used as a pharmacological agent and solvent.. tetrahydrofuranone : Any oxolane having an oxo- substituent at any position on the tetrahydrofuran ring.. gamma-butyrolactone : A butan-4-olide that is tetrahydrofuran substituted by an oxo group at position 2.	2.05	1	0	butan-4-olide	metabolite; neurotoxin
4-chloro-alpha,alpha,alpha-trifluorotoluene 4-chloro-alpha,alpha,alpha-trifluorotoluene: RN given refers to cpd with specified locants for chloride & trifluoromethyl moieties; structure given in first source	2.04	1	0
alpha-methylstyrol [no description available]	1.96	1	0	olefinic compound
5-nitro-2-toluidine 5-nitro-2-toluidine: structure given in first source; RN given refers to parent cpd. 5-nitro-o-toluidine : A C-nitro compound in which the nitro compound is meta to the amino group and para to the methyl group of o-toluidine.	2.05	1	0	C-nitro compound
5-nitro-2-methoxyaniline 5-nitro-2-methoxyaniline: RN given refers to parent cpd	2.05	1	0	4-nitroanisoles; substituted aniline
4-vinylcyclohexene 4-vinylcyclohexene: structure	2	1	0	cyclic olefin
ethylbenzene [no description available]	3.3	6	0	alkylbenzene
styrene Styrene: A colorless, toxic liquid with a strong aromatic odor. It is used to make rubbers, polymers and copolymers, and polystyrene plastics.. styrene : A vinylarene that is benzene carrying a vinyl group. It has been isolated from the benzoin resin produced by Styrax species.	7.57	56	0	styrenes; vinylarene; volatile organic compound	mouse metabolite; mutagen; plant metabolite
di-(4-aminophenyl)ether di-(4-aminophenyl)ether: structure	2.05	1	0	aromatic ether
lauroyl peroxide [no description available]	2.02	1	0	dicarboxylic acid
4-xylene p-xylene : A xylene with methyl groups at positions 1 and 4.	2.51	2	0	xylene
ethylene dibromide Ethylene Dibromide: An effective soil fumigant, insecticide, and nematocide. In humans, it causes severe burning of skin and irritation of the eyes and respiratory tract. Prolonged inhalation may cause liver necrosis. It is also used in gasoline. Members of this group have caused liver and lung cancers in rodents. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), 1,2-dibromoethane may reasonably be anticipated to be a carcinogen.. 1,2-dibromoethane : A bromoalkane that is ethane carrying bromo substituents at positions 1 and 2. It is produced by marine algae.	3.82	3	0	bromoalkane; bromohydrocarbon	algal metabolite; carcinogenic agent; fumigant; marine metabolite; mouse metabolite; mutagen
1-bromopropane 1-bromopropane: used as a solvent. 1-bromopropane : A bromoalkane that is propane carrying a bromo substituent at position 1.	2.6	1	0	bromoalkane; bromohydrocarbon	neurotoxin; solvent
butane butane : A straight chain alkane composed of 4 carbon atoms.	7.46	2	0	alkane; gas molecular entity	food propellant; refrigerant
1-butene but-1-ene : A butene with unsaturation at position 1.	2.98	4	0	butene
acrolein [no description available]	7.95	13	2	enal	herbicide; human xenobiotic metabolite; toxin
acrylonitrile [no description available]	7.11	42	0	aliphatic nitrile; volatile organic compound	antifungal agent; carcinogenic agent; fungal metabolite; mutagen; polar aprotic solvent
glyoxal [no description available]	2.07	1	0	dialdehyde	agrochemical; allergen; pesticide; plant growth regulator
chloromethyl methyl ether chloromethyl methyl ether: was MH 1977-92 (see under METHYL ETHERS 1977-90); METHOXYCHLOROMETHANE & METHYL CHLOROMETHYL ETHER were see CHLOROMETHYL METHYL ETHER 1977-92; use METHYL ETHERS to search CHLOROMETHYL METHYL ETHER 1977-92; an alpha halo ether alkylating agent used widely in chemical & plastic industries; it causes lung hyperplasias & neoplasms & skin neoplasms	3.09	1	0	ether
2-methylpentane Hexanes: Six-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives. Various polyneuropathies are caused by hexane poisoning.	4.4	6	0	alkane
3-hydroxybutanal [no description available]	2.53	2	0
maleic anhydride Maleic Anhydrides: Used in copolymerization reactions, in the Diels-Alder(diene)synthesis, in the preparation of resins, pharmaceuticals and agricultural chemicals. It is a powerful irritant and causes burns.. maleic anhydride : A cyclic dicarboxylic anhydride that is the cyclic anhydride of maleic acid.	2.21	1	0	cyclic dicarboxylic anhydride; furans	allergen
pentane Pentanes: Five-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives.. pentane : A straight chain alkane consisting of 5 carbon atoms.	7.2	27	0	alkane; volatile organic compound	non-polar solvent; refrigerant
pyrroles 1H-pyrrole : A tautomer of pyrrole that has the double bonds at positions 2 and 4.. pyrrole : A five-membered monocyclic heteroarene comprising one NH and four CH units which forms the parent compound of the pyrrole group of compounds. Its five-membered ring structure has three tautomers. A 'closed class'.. azole : Any monocyclic heteroarene consisting of a five-membered ring containing nitrogen. Azoles can also contain one or more other non-carbon atoms, such as nitrogen, sulfur or oxygen.	2.05	1	0	pyrrole; secondary amine
tetrahydrofuran oxolane : A cyclic ether that is butane in which one hydrogen from each methyl group is substituted by an oxygen.	2.05	1	0	cyclic ether; oxolanes; saturated organic heteromonocyclic parent; volatile organic compound	polar aprotic solvent
n-hexane hexane : An unbranched alkane containing six carbon atoms.	9.4	6	0	alkane; volatile organic compound	neurotoxin; non-polar solvent
cyclohexane Cyclohexane: C6H12. cyclohexane : An alicyclic hydrocarbon comprising a ring of six carbon atoms; the cyclic form of hexane, used as a raw material in the manufacture of nylon.	2.04	1	0	cycloalkane; volatile organic compound	non-polar solvent
cyclohexene cyclohexene : A cycloalkene that is cylohexane with a single double bond.	2.51	2	0	cycloalkene
piperidine [no description available]	2.05	1	0	azacycloalkane; piperidines; saturated organic heteromonocyclic parent; secondary amine	base; catalyst; human metabolite; non-polar solvent; plant metabolite; protic solvent; reagent
octyl acetate octyl acetate : The acetate ester of octan-1-ol.	2.15	1	0	acetate ester	plant metabolite
propylene propylene: structure	8.93	13	0	alkene; gas molecular entity	refrigerant; xenobiotic
isobutylene 2-methylprop-1-ene : An alkene that is prop-1-ene substituted by a methyl group at position 2.	1.98	1	0	alkene; gas molecular entity
tetrafluoroethylene tetrafluoroethylene: RN given refers to parent cpd; structure	2.05	1	0	fluorocarbon
2-aminoanthraquinone [no description available]	2.05	1	0	anthraquinone
diethylhexyl phthalate Diethylhexyl Phthalate: An ester of phthalic acid. It appears as a light-colored, odorless liquid and is used as a plasticizer for many resins and elastomers.. bis(2-ethylhexyl) phthalate : A phthalate ester that is the bis(2-ethylhexyl) ester of benzene-1,2-dicarboxylic acid.	3.08	1	0	diester; phthalate ester	androstane receptor agonist; apoptosis inhibitor; plasticiser
cresidine cresidine: structure	2.05	1	0	methoxybenzenes
amiben Amiben: RN given refers to parent cpd	2.05	1	0	chlorobenzoic acid
2,4,5-trimethylaniline 2,4,5-trimethylaniline: RN given refers to parent cpd	2.05	1	0	substituted aniline
4,4'-thiodianiline 4,4'-thiodianiline: structure	2.05	1	0	substituted aniline
n-heptane Heptanes: Seven-carbon alkanes with the formula C7H16.. heptane : A straight-chain alkane with seven carbon atoms. It has been found in Jeffrey pine (Pinus jeffreyi).	2.04	1	0	alkane; volatile organic compound	non-polar solvent; plant metabolite
ditiocarb Ditiocarb: A chelating agent that has been used to mobilize toxic metals from the tissues of humans and experimental animals. It is the main metabolite of DISULFIRAM.. diethyldithiocarbamic acid : A member of the class of dithiocarbamic acids that is diethylcarbamic acid in which both of the oxygens are replaced by sulfur.	2.03	1	0	dithiocarbamic acids	chelator; copper chelator
quinazolines Quinazolines: A group of aromatic heterocyclic compounds that contain a bicyclic structure with two fused six-membered aromatic rings, a benzene ring and a pyrimidine ring.. quinazoline : A mancude organic heterobicyclic parent that is naphthalene in which the carbon atoms at positions 1 and 3 have been replaced by nitrogen atoms.. quinazolines : Any organic heterobicyclic compound based on a quinazoline skeleton and its substituted derivatives.	3.51	1	0	azaarene; mancude organic heterobicyclic parent; ortho-fused heteroarene; quinazolines
acridines Acridines: Compounds that include the structure of acridine.. acridine : A polycyclic heteroarene that is anthracene in which one of the central CH groups is replaced by a nitrogen atom.	1.94	1	0	acridines; mancude organic heterotricyclic parent; polycyclic heteroarene	genotoxin
cyclopentane Cyclopentanes: A group of alicyclic hydrocarbons with the general formula R-C5H9.. cyclopentanes : Cyclopentane and its derivatives formed by substitution.	2.5	2	0	cycloalkane; cyclopentanes; volatile organic compound	non-polar solvent
monocrotaline Monocrotaline: A pyrrolizidine alkaloid and a toxic plant constituent that poisons livestock and humans through the ingestion of contaminated grains and other foods. The alkaloid causes pulmonary artery hypertension, right ventricular hypertrophy, and pathological changes in the pulmonary vasculature. Significant attenuation of the cardiopulmonary changes are noted after oral magnesium treatment.	1.97	1	0	pyrrolizidine alkaloid
diazomethane Diazomethane: A diazonium compound with the formula CH2N2.. diazomethane : The simplest diazo compound, in which a diazo group is attached to a methylene group.	2.05	1	0	diazo compound	alkylating agent; antineoplastic agent; carcinogenic agent; poison
cyanogen cyanogen: structure. oxalonitrile : A dinitrile that is ethane substituted by two cyano groups.	2.33	2	0	dinitrile; pseudohalogen
fluorobenzenes Fluorobenzenes: Derivatives of BENZENE that contain FLUORINE.. monofluorobenzene : The simplest member of the class of monofluorobenzenes that is benzene carrying a single fluoro substituent.. fluorobenzenes : Any fluoroarene that is a benzene or a substituted benzene carrying at least one fluoro group.	2.02	1	0	monofluorobenzenes	NMR chemical shift reference compound
propadiene [no description available]	2.1	1	0	allenes
ketene ketene: structure. ketene : Carbonyl compounds where the C=O bond is conjugated to an alkylidene group.	2.1	1	0	ketene
glycyrrhetinic acid [no description available]	2.04	1	0	cyclic terpene ketone; hydroxy monocarboxylic acid; pentacyclic triterpenoid	immunomodulator; plant metabolite
3-butene-1,2-diol 3-butene-1,2-diol: major industrial chemical; structure given in first source	3.72	10	0
caprolactone hexano-6-lactone : A epsilon-lactone that is oxepane substituted by an oxo group at position 2.	2.41	1	0	epsilon-lactone
phorone phorone: an industrial solvent; structure	2.4	2	0	dialkenyl ketone
mustard gas Mustard Gas: Severe irritant and vesicant of skin, eyes, and lungs. It may cause blindness and lethal lung edema and was formerly used as a war gas. The substance has been proposed as a cytostatic and for treatment of psoriasis. It has been listed as a known carcinogen in the Fourth Annual Report on Carcinogens (NTP-85-002, 1985) (Merck, 11th ed).. bis(2-chloroethyl) sulfide : An ethyl sulfide that is diethyl sulfide in which a hydrogen from each of the terminal methyl groups is replaced by a chlorine. It is a powerful vesicant regulated under the Chemical Weapons Convention.	3.45	2	0	ethyl sulfide; organochlorine compound	alkylating agent; carcinogenic agent; vesicant
chlorobenzilate chlorobenzilate: structure	2.05	1	0	diarylmethane
1,2-dichloroethylene 1,2-dichloroethylene: RN given refers to cpd without isomeric designation	2	1	0	chloroethenes
bis(chloromethyl) ether Bis(Chloromethyl) Ether: A substance that is an irritant to the eyes and respiratory tract and may be carcinogenic.. bis(chloromethyl) ether : An ether that is dimethyl ether in which one of the hydrogens attached to each of the methyl group has replaced by a chlorine.	3.09	1	0	ether; organochlorine compound	alkylating agent; carcinogenic agent
diepoxybutane diepoxybutane: difunctional alkylating agent; RN given refers to cpd with unspecified isomeric designation; structure	7.7	65	0	epoxide	mutagen
iodobenzene iodobenzene: RN given refers to unlabeled parent cpd	2.07	1	0
vinyl bromide vinyl bromide: structure	7.03	1	0	bromoalkene; monohaloethene
5-nitroacenaphthene [no description available]	2.05	1	0	nitronaphthalene
triphenylphosphine triphenylphosphine: RN given refers to parent cpd. triphenylphosphine : A member of the class of tertiary phosphines that is phosphane in which the three hydrogens are replaced by phenyl groups.	7.44	2	0	benzenes; tertiary phosphine	NMR chemical shift reference compound; reducing agent
1-penten-3-ol [no description available]	2.15	1	0	alcohol
acetylcysteine N-acetyl-L-cysteine : An N-acetyl-L-amino acid that is the N-acetylated derivative of the natural amino acid L-cysteine.	4.19	16	0	acetylcysteine; L-cysteine derivative; N-acetyl-L-amino acid	antidote to paracetamol poisoning; antiinfective agent; antioxidant; antiviral drug; ferroptosis inhibitor; geroprotector; human metabolite; mucolytic; radical scavenger; vulnerary
2,5-dimethylfuran 2,5-dimethylfuran: metabolite of n-hexane. 2,5-dimethylfuran : A member of the class of furans that is furan in which the hydrogens at positions 2 and 5 are replaced by methyl groups.	7.44	2	0	furans	antifungal agent; bacterial metabolite; fuel; fumigant; human urinary metabolite; Maillard reaction product; plant metabolite
1,4-cyclohexadiene [no description available]	2	1	0	cyclohexadiene
1,1,1,2-tetrachloroethane 1,1,1,2-tetrachloroethane: see also record for tetrachloroethane	2.05	1	0	chloroethanes
erythromycin Erythromycin: A bacteriostatic antibiotic macrolide produced by Streptomyces erythreus. Erythromycin A is considered its major active component. In sensitive organisms, it inhibits protein synthesis by binding to 50S ribosomal subunits. This binding process inhibits peptidyl transferase activity and interferes with translocation of amino acids during translation and assembly of proteins.. erythromycin : Any of several wide-spectrum macrolide antibiotics obtained from actinomycete Saccharopolyspora erythraea (formerly known as Streptomyces erythraeus).. erythromycin A : An erythromycin that consists of erythronolide A having 2,6-dideoxy-3-C-methyl-3-O-methyl-alpha-L-ribo-hexopyranosyl and 3,4,6-trideoxy-3-(dimethylamino)-beta-D-xylo-hexopyranosyl residues attahced at positions 4 and 6 respectively.	2.04	1	0	cyclic ketone; erythromycin
isosorbide Isosorbide: 1,4:3,6-Dianhydro D-glucitol. Chemically inert osmotic diuretic used mainly to treat hydrocephalus; also used in glaucoma.	2.06	1	0	organic molecular entity
2'-deoxy-5'-adenosine monophosphate 2'-deoxy-5'-adenosine monophosphate: RN given refers to parent cpd. 2'-deoxyadenosine 5'-monophosphate : A purine 2'-deoxyribonucleoside 5'-monophosphate having adenine as the nucleobase.	1.99	1	0	2'-deoxyadenosine 5'-phosphate; purine 2'-deoxyribonucleoside 5'-monophosphate	fundamental metabolite
1-chloro-2-hydroxy-3-butene [no description available]	2.73	3	0
ethylnitrosourea Ethylnitrosourea: A nitrosourea compound with alkylating, carcinogenic, and mutagenic properties.. N-ethyl-N-nitrosourea : A member of the class of N-nitrosoureas that is urea in which one of the nitrogens is substituted by ethyl and nitroso groups.	2.39	2	0	N-nitrosoureas	alkylating agent; carcinogenic agent; genotoxin; mutagen
3,4-epoxy-1-butene 3,4-epoxy-1-butene: RN given refers to monomer	12.49	69	0
deoxycytidine [no description available]	7.08	1	0	pyrimidine 2'-deoxyribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
deoxyuridine [no description available]	2.03	1	0	pyrimidine 2'-deoxyribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
2'-deoxyadenosine 2'-deoxyformycin A: RN not in Chemline 9/85; RN and structure given in first source	7.52	2	0	purine 2'-deoxyribonucleoside; purines 2'-deoxy-D-ribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
decabromobiphenyl ether decabromobiphenyl ether: a flame retardant. decabromodiphenyl ether : A polybromodiphenyl ether that is diphenyl ether in which all of the hydrogens have been replaced by bromines.	2.21	1	0	polybromodiphenyl ether	neurotoxin
manganese dioxide [no description available]	2.08	1	0	manganese molecular entity; metal oxide
bisphenol a-glycidyl methacrylate Bisphenol A-Glycidyl Methacrylate: The reaction product of bisphenol A and glycidyl methacrylate that undergoes polymerization when exposed to ultraviolet light or mixed with a catalyst. It is used as a bond implant material and as the resin component of dental sealants and composite restorative materials.	2.17	1	0	diarylmethane
methyl tert-butyl ether methyl tert-butyl ether: used to dissolve gallstones; gasoline additive. methyl tert-butyl ether : An ether having methyl and tert-butyl as the two alkyl components.	1.99	1	0	ether	fuel additive; metabolite; non-polar solvent
2,3,7,8-tetrachlorodibenzodioxine Tetrachlorodibenzodioxin: A mixture of isomers.	2.05	1	0	polychlorinated dibenzodioxine
nitrofen nitrofen: structure	2.05	1	0	organic molecular entity	EC 1.3.3.4 (protoporphyrinogen oxidase) inhibitor; herbicide
1,3,5-hexatriene 1,3,5-hexatriene: structure in first source	2.08	1	0
1,5-naphthalenediamine 1,5-diaminonaphthalene: structure in first source. naphthalene-1,5-diamine : A naphthalenediamine compound having amino substituents in the 1- and 5-positions.	2.05	1	0	naphthalenediamine	carcinogenic agent
phenethyl isothiocyanate phenethyl isothiocyanate: a dietary liver aldehyde dehydrogenase inhibitor; promotes urinary bladder carcinoma. phenethyl isothiocyanate : An isothiocyanate having a phenethyl group attached to the nitrogen. It is a naturally occurring compound found in some cruciferous vegetables (e.g. watercress) and is known to possess anticancer properties.	8.64	1	1	isothiocyanate	antineoplastic agent; EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor; metabolite
sulfur hexafluoride Sulfur Hexafluoride: Sulfur hexafluoride. An inert gas used mainly as a test gas in respiratory physiology. Other uses include its injection in vitreoretinal surgery to restore the vitreous chamber and as a tracer in monitoring the dispersion and deposition of air pollutants.. sulfur hexafluoride : A sulfur coordination entity consisting of six fluorine atoms attached to a central sulfur atom. It is the most potent greenhouse gas currently known, with a global warming potential of 23,900 times that of CO2 over a 100 year period (SF6 has an estimated lifetime in the atmosphere of between 800 and 3,000 years).	2.04	1	0	sulfur coordination entity	greenhouse gas; NMR chemical shift reference compound; ultrasound contrast agent
n-methylamino-2-nitro-4-n',n'-bis(2-hydroxyethyl)aminobenzene N-methylamino-2-nitro-4-N',N'-bis(2-hydroxyethyl)aminobenzene: structure	2.05	1	0	C-nitro compound
toliprolol toliprolol: was MH 1975-92 (see under PROPANOLAMINES 1981-90, was DOBEROL see under PROPANOLAMINES 1975-80); KOE 592 was see TOLIPROLOL 1975-92; use PROPANOLAMINES to search TOLIPROLOL 1975-92; beta adrenergic blockader with some stimulant action; it has been proposed for angina pectoris	2.04	1	0	aromatic ether
beta-butyrolactone beta-butyrolactone: structure	2.05	1	0	beta-lactone
dicloxacillin Dicloxacillin: One of the PENICILLINS which is resistant to PENICILLINASE.. dicloxacillin : A penicillin that is 6-aminopenicillanic acid in which one of the amino hydrogens is replaced by a 3-(2,6-dichlorophenyl)-5-methyl-1,2-oxazol-4-yl]formyl group.	2.04	1	0	dichlorobenzene; penicillin	antibacterial drug
buthionine sulfoximine Buthionine Sulfoximine: A synthetic amino acid that depletes glutathione by irreversibly inhibiting gamma-glutamylcysteine synthetase. Inhibition of this enzyme is a critical step in glutathione biosynthesis. It has been shown to inhibit the proliferative response in human T-lymphocytes and inhibit macrophage activation. (J Biol Chem 1995;270(33):1945-7). 2-amino-4-(S-butylsulfonimidoyl)butanoic acid : A non-proteinogenic alpha-amino acid that is homocysteine in which the thiol group carries an oxo, imino and butyl groups.. S-butyl-DL-homocysteine (S,R)-sulfoximine : A sulfoximide that is the sulfoximine derivative of an analogue of DL-methionine in which the S-methyl group is replaced by S-butyl.	2.08	1	0	diastereoisomeric mixture; homocysteines; non-proteinogenic alpha-amino acid; sulfoximide	EC 6.3.2.2 (glutamate--cysteine ligase) inhibitor; ferroptosis inducer
1-hydroxypyrene 1-hydroxypyrene: pyrene metabolite; RN given refers to parent cpd	4.4	2	2	pyrenes
mercury Mercury: A silver metallic element that exists as a liquid at room temperature. It has the atomic symbol Hg (from hydrargyrum, liquid silver), atomic number 80, and atomic weight 200.59. Mercury is used in many industrial applications and its salts have been employed therapeutically as purgatives, antisyphilitics, disinfectants, and astringents. It can be absorbed through the skin and mucous membranes which leads to MERCURY POISONING. Because of its toxicity, the clinical use of mercury and mercurials is diminishing.. mercury(0) : Elemental mercury of oxidation state zero.	2.06	1	0	elemental mercury; zinc group element atom	neurotoxin
molybdenum Molybdenum: A metallic element with the atomic symbol Mo, atomic number 42, and atomic weight 95.95. It is an essential trace element, being a component of the enzymes xanthine oxidase, aldehyde oxidase, and nitrate reductase.	2.05	1	0	chromium group element atom	micronutrient
palladium Palladium: A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.. palladium : Chemical element (nickel group element atom) with atomic number 46.	4.26	17	0	metal allergen; nickel group element atom; platinum group metal atom
platinum Platinum: A heavy, soft, whitish metal, resembling tin, with atomic number 78, atomic weight 195.084, symbol Pt. It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as alutiae.	2.11	1	0	elemental platinum; nickel group element atom; platinum group metal atom
rhodium Rhodium: A hard and rare metal of the platinum group, atomic number 45, atomic weight 102.905, symbol Rh.. rhodium atom : A cobalt group element atom of atomic number 45.	2.31	1	0	cobalt group element atom
ruthenium Ruthenium: A hard, brittle, grayish-white rare earth metal with an atomic symbol Ru, atomic number 44, and atomic weight 101.07. It is used as a catalyst and hardener for PLATINUM and PALLADIUM.	3.11	4	0	iron group element atom; platinum group metal atom
scandium Scandium: An element of the rare earth family of metals. It has the atomic symbol Sc, atomic number 21, and atomic weight 45.	7.46	2	0	d-block element atom; rare earth metal atom; scandium group element atom
silver Silver: An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.	2.52	2	0	copper group element atom; elemental silver	Escherichia coli metabolite
titanium Titanium: A dark-gray, metallic element of widespread distribution but occurring in small amounts with atomic number, 22, atomic weight, 47.867 and symbol, Ti; specific gravity, 4.5; used for fixation of fractures.	3.38	6	0	titanium group element atom
cadmium Cadmium: An element with atomic symbol Cd, atomic number 48, and atomic weight 112.41. It is a metal and ingestion will lead to CADMIUM POISONING.. elemental cadmium : An element in the zinc group of the periodic table with atomic number 48, atomic mass 112, M.P. 321degreeC, and B.P. 765degreeC). An odourless, tasteless, and highly poisonous soft, ductile, lustrous metal with electropositive properties. It has eight stable isotopes: (106)Cd, (108)Cd,(110)Cd, (111)Cd, (112)Cd, (113)Cd, (114)Cd and (116)Cd, with (112)Cd and (114)Cd being the most common.	2.05	1	0	cadmium molecular entity; zinc group element atom
chromium Chromium: A trace element that plays a role in glucose metabolism. It has the atomic symbol Cr, atomic number 24, and atomic weight 52. According to the Fourth Annual Report on Carcinogens (NTP85-002,1985), chromium and some of its compounds have been listed as known carcinogens.. chromium ion : An chromium atom having a net electric charge.. chromium atom : A chromium group element atom that has atomic number 24.	2.74	3	0	chromium group element atom; metal allergen	micronutrient
gadolinium Gadolinium: An element of the rare earth family of metals. It has the atomic symbol Gd, atomic number 64, and atomic weight 157.25. Its oxide is used in the control rods of some nuclear reactors.	2.41	1	0	f-block element atom; lanthanoid atom
gold Gold: A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts.	8.34	6	0	copper group element atom; elemental gold
helium Helium: A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics.	2.04	1	0	monoatomic helium; noble gas atom; s-block element atom	food packaging gas
ytterbium Ytterbium: An element of the rare earth family of metals. It has the atomic symbol Yb, atomic number 70, and atomic weight 173. Ytterbium has been used in lasers and as a portable x-ray source.	2.05	1	0	f-block element atom; lanthanoid atom
yttrium Yttrium: An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers.	2.05	1	0	d-block element atom; rare earth metal atom; scandium group element atom
zirconium Zirconium: A rather rare metallic element with atomic number 40, atomic weight 91.224, and symbol Zr.	2.02	1	0	titanium group element atom
aluminum chloride Aluminum Chloride: A compound with the chemical formula AlCl3; the anhydrous salt is used as a catalyst in organic chemical synthesis, and hydrated salts are used topically as antiperspirants, and for the management of HYPERHYDROSIS.	2.1	1	0	aluminium coordination entity	Lewis acid
zalcitabine Zalcitabine: A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by a hydrogen. This modification prevents the formation of phosphodiester linkages which are needed for the completion of nucleic acid chains. The compound is a potent inhibitor of HIV replication at low concentrations, acting as a chain-terminator of viral DNA by binding to reverse transcriptase. Its principal toxic side effect is axonal degeneration resulting in peripheral neuropathy.. zalcitabine : A pyrimidine 2',3'-dideoxyribonucleoside compound having cytosine as the nucleobase.	3.25	6	0	pyrimidine 2',3'-dideoxyribonucleoside	antimetabolite; antiviral drug; HIV-1 reverse transcriptase inhibitor
hypochlorous acid Hypochlorous Acid: An oxyacid of chlorine (HClO) containing monovalent chlorine that acts as an oxidizing or reducing agent.. hypochlorous acid : A chlorine oxoacid with formula HOCl; a weak, unstable acid, it is the active form of chlorine in water.	3.25	1	0	chlorine oxoacid; reactive oxygen species	EC 2.5.1.18 (glutathione transferase) inhibitor; EC 3.1.1.7 (acetylcholinesterase) inhibitor; human metabolite
phosphine phosphane : The simplest phosphine, consisting of a single phosphorus atom with three hydrogens attached.. phosphine : Phosphane (PH3) and compounds derived from it by substituting one, two or three hydrogen atoms by hydrocarbyl groups: RPH2, R2PH, R3P (R =/= H) are called primary, secondary and tertiary phosphines, respectively. A specific phosphine is preferably named as a substituted phosphane.	2.85	3	0	mononuclear parent hydride; phosphanes; phosphine	carcinogenic agent; fumigant insecticide
bromine Bromine: A halogen with the atomic symbol Br, atomic number 35, and atomic weight 79.904. It is a volatile reddish-brown liquid that gives off suffocating vapors, is corrosive to the skin, and may cause severe gastroenteritis if ingested.	7.57	2	0	diatomic bromine
calcium hypochlorite calcium hypochlorite: structure	2.15	1	0	calcium salt; inorganic calcium salt	bleaching agent
deuterium Deuterium: The stable isotope of hydrogen. It has one neutron and one proton in the nucleus.	2.46	2	0	dihydrogen
chlorine Chlorine: An element with atomic symbol Cl, atomic number 17, and atomic weight 35, and member of the halogen family.	2.89	4	0	diatomic chlorine; gas molecular entity	bleaching agent
ozone Ozone: The unstable triatomic form of oxygen, O3. It is a powerful oxidant that is produced for various chemical and industrial uses. Its production is also catalyzed in the ATMOSPHERE by ULTRAVIOLET RAY irradiation of oxygen or other ozone precursors such as VOLATILE ORGANIC COMPOUNDS and NITROGEN OXIDES. About 90% of the ozone in the atmosphere exists in the stratosphere (STRATOSPHERIC OZONE).. ozone : An elemental molecule with formula O3. An explosive, pale blue gas (b.p. -112degreeC) that has a characteristic, pungent odour, it is continuously produced in the upper atmosphere by the action of solar ultraviolet radiation on atmospheric oxygen. It is an antimicrobial agent used in the production of bottled water, as well as in the treatment of meat, poultry and other foodstuffs.	3.43	7	0	elemental molecule; gas molecular entity; reactive oxygen species; triatomic oxygen	antiseptic drug; disinfectant; electrophilic reagent; greenhouse gas; mutagen; oxidising agent; tracer
radon Radon: A naturally radioactive element with atomic symbol Rn, and atomic number 86. It is a member of the noble gas family found in soil, and is released during the decay of RADIUM.. radon(0) : A monoatomic radon that has an oxidation state of zero.	3.08	1	0	monoatomic radon; noble gas atom; p-block element atom
titanium dioxide titanium dioxide: used medically as protectant against externally caused irritation & sunlight; high concentrations of dust may cause irritation to respiratory tract; RN given refers to titanium oxide (TiO2); structure. titanium dioxide : A titanium oxide with the formula TiO2. A naturally occurring oxide sourced from ilmenite, rutile and anatase, it has a wide range of applications.	2.83	3	0	titanium oxides	food colouring
salen disalicylaldehyde ethylenediamine: reagents for determination of iron	2.1	1	0
tiletamine hydrochloride Cyclohexanones: Cyclohexane ring substituted by one or more ketones in any position.. cyclohexanones : Any alicyclic ketone based on a cyclohexane skeleton and its substituted derivatives thereof.	2.05	1	0
1,2-diphenylhydrazine [no description available]	2.05	1	0
phenyl acetate phenyl acetate: The ester formed between phenol and acetic acid. Don't confuse with phenylacetic acid derivatives listed under PHENYLACETATES.. phenyl acetate : An acetate ester obtained by the formal condensation of phenol with acetic acid.	2.63	2	0	benzenes; phenyl acetates
1,4-dioxane 1,4-dioxane: dehydrating agent; polar solvent miscible both with water & most organic solvents. dioxane : Any member of the class of dioxanes that is a cyclohexane in which two carbon atoms are replaced by oxygen atoms.. 1,4-dioxane : A dioxane with oxygen atoms at positions 1 and 4.	2.05	1	0	dioxane; volatile organic compound	carcinogenic agent; metabolite; NMR chemical shift reference compound; non-polar solvent
chloroprene Chloroprene: Toxic, possibly carcinogenic, monomer of neoprene, a synthetic rubber; causes damage to skin, lungs, CNS, kidneys, liver, blood cells and fetuses. Synonym: 2-chlorobutadiene.	6.49	19	0	chloroolefin
tetrachloroethylene Tetrachloroethylene: A chlorinated hydrocarbon used as an industrial solvent and cooling liquid in electrical transformers. It is a potential carcinogen.	4.54	4	0	chlorocarbon; chloroethenes	nephrotoxic agent
pyrene pyrene: structure in Merck Index, 9th ed, #7746. pyrene : An ortho- and peri-fused polycyclic arene consisting of four fused benzene rings, resulting in a flat aromatic system.	3.88	4	0	ortho- and peri-fused polycyclic arene	fluorescent probe; persistent organic pollutant
alkenes [no description available]	6.73	31	0
cefazolin Cefazolin: A semisynthetic cephalosporin analog with broad-spectrum antibiotic action due to inhibition of bacterial cell wall synthesis. It attains high serum levels and is excreted quickly via the urine.. cefazolin : A first-generation cephalosporin compound having [(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]methyl and (1H-tetrazol-1-ylacetyl)amino side-groups at positions 3 and 7 respectively.	2.04	1	0	beta-lactam antibiotic allergen; cephalosporin; tetrazoles; thiadiazoles	antibacterial drug
timolol (S)-timolol (anhydrous) : The (S)-(-) (more active) enantiomer of timolol. A beta-adrenergic antagonist, both the hemihydrate and the maleate salt are used in the mangement of glaucoma, hypertension, angina pectoris and myocardial infarction, and for the prevention of migraine.	2.04	1	0	timolol	anti-arrhythmia drug; antiglaucoma drug; antihypertensive agent; beta-adrenergic antagonist
ribavirin Rebetron: Rebetron is tradename	2.02	1	0	1-ribosyltriazole; aromatic amide; monocarboxylic acid amide; primary carboxamide	anticoronaviral agent; antiinfective agent; antimetabolite; antiviral agent; EC 2.7.7.49 (RNA-directed DNA polymerase) inhibitor
miloxacin miloxacin: structure in second source	2.04	1	0	quinolines
4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone: structure; from tobacco smoke	6.15	6	2	nitrosamine; pyridines
alfentanil Alfentanil: A short-acting opioid anesthetic and analgesic derivative of FENTANYL. It produces an early peak analgesic effect and fast recovery of consciousness. Alfentanil is effective as an anesthetic during surgery, for supplementation of analgesia during surgical procedures, and as an analgesic for critically ill patients.. alfentanil : A member of the class of piperidines that is piperidine having a 2-(4-ethyl-5-oxo-4,5-dihydro-1H-tetrazol-1-yl)ethyl group at the 1-position as well as N-phenylpropanamido- and methoxymethyl groups at the 4-position.	2.04	1	0	monocarboxylic acid amide; piperidines	central nervous system depressant; intravenous anaesthetic; mu-opioid receptor agonist; opioid analgesic; peripheral nervous system drug
1,3-pentadiene 1,3-pentadiene: a linear 5-carbon alkene; RN given refers to cpd with unspecified isomeric designation. (E)-1,3-pentadiene : An alkadiene consisting of pentane with the two double bonds located at positions 1 and 3.	7.58	2	0	alkadiene
2-butene 2-butene: RN given refers to cpd without isomeric designation	2.08	1	0	but-2-ene
oseltamivir Oseltamivir: An acetamido cyclohexene that is a structural homolog of SIALIC ACID and inhibits NEURAMINIDASE.. oseltamivir : A cyclohexenecarboxylate ester that is the ethyl ester of oseltamivir acid. An antiviral prodrug (it is hydrolysed to the active free carboxylic acid in the liver), it is used to slow the spread of influenza.	7.03	1	0	acetamides; amino acid ester; cyclohexenecarboxylate ester; primary amino compound	antiviral drug; EC 3.2.1.18 (exo-alpha-sialidase) inhibitor; environmental contaminant; prodrug; xenobiotic
trofosfamide trofosfamide: cyclophosphamide analog; structure	3.09	1	0	ifosfamides
inaperisone inaperisone: structure given in first source; RN given refers to parent cpd without isomeric designation	2.04	1	0	aromatic ketone
4-phenylbenzoic acid 4-phenylbenzoic acid: RN given refers to 4-carboxylic cpd	2.04	1	0
triazoles Triazoles: Heterocyclic compounds containing a five-membered ring with two carbon atoms and three nitrogen atoms with the molecular formula C2H3N3.. triazoles : An azole in which the five-membered heterocyclic aromatic skeleton contains three N atoms and two C atoms.	3.57	2	0	1,2,3-triazole
isocoumarins Isocoumarins: Compounds that differ from COUMARINS in having the positions of the ring and ketone oxygens reversed so the keto oxygen is at the 1-position of the molecule.. isocoumarin : The simplest member of the class of isocoumarins that is 1H-isochromene which is substituted by an oxo group at position 1.	2.13	1	0	isocoumarins
delphinidin Paraffin: A mixture of solid hydrocarbons obtained from petroleum. It has a wide range of uses including as a stiffening agent in ointments, as a lubricant, and as a topical anti-inflammatory. It is also commonly used as an embedding material in histology.. delphinidin chloride : An anthocyanidin chloride that has delphinidin as the cationic counterpart.	2.15	1	0	anthocyanidin chloride
benzocyclobutene benzocyclobutene : A carbobicyclic compound that is benzene fused to a cyclobutane ring.	7	1	0	carbobicyclic compound	metabolite
nicotine (S)-nicotine : A 3-(1-methylpyrrolidin-2-yl)pyridine in which the chiral centre has S-configuration. The naturally occurring and most active enantiomer of nicotine, isolated from Nicotiana tabacum.	6.16	6	2	3-(1-methylpyrrolidin-2-yl)pyridine	anxiolytic drug; biomarker; immunomodulator; mitogen; neurotoxin; nicotinic acetylcholine receptor agonist; peripheral nervous system drug; phytogenic insecticide; plant metabolite; psychotropic drug; teratogenic agent; xenobiotic
n(alpha)-acetyllysine N(alpha)-acetyllysine: RN given refers to (L)-isomer. acetyl-L-lysine : An N-acetyl-L-amino acid that is the N-acetyl derivative of L-lysine.. N(2)-acetyl-L-lysine : An acetyl-L-lysine where the acetyl group is located at the N(2)-posiiton.	2.05	1	0	acetyl-L-lysine; amino acid zwitterion	human metabolite
cobalt Cobalt: A trace element that is a component of vitamin B12. It has the atomic symbol Co, atomic number 27, and atomic weight 58.93. It is used in nuclear weapons, alloys, and pigments. Deficiency in animals leads to anemia; its excess in humans can lead to erythrocytosis.. cobalt(1+) : A monovalent inorganic cation obtained from cobalt.. cobalt atom : A cobalt group element atom that has atomic number 27.	8.02	4	0	cobalt group element atom; metal allergen	micronutrient
4-(methylnitrosamino)-1-(3-pyridyl)-1-butan-1-ol 4-(methylnitrosamino)-1-(3-pyridyl)-1-butan-1-ol: structure in first source. 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol : A member of the class of nitrosamines that is butan-1-ol substituted by a pyridin-3-yl group at position 1 and by a methyl(nitroso)amino group at position 4. It is a major metabolite of nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), which is a carcinogen found in tobacco and responsible for inducing lung cancer in smokers.	2.06	1	0	nitrosamine; pyridines; secondary alcohol	biomarker; carcinogenic agent; human urinary metabolite
cyanates Cyanates: Organic salts of cyanic acid containing the -OCN radical.. cyanates : Salts and esters of cyanic acid, HOC#N; compounds carrying the cyanate functional group -O-C#N.. isocyanates : Organonitrogen compounds that are derivatives of isocyanic acid; compounds containing the isocyanate functional group -N=C=O (as opposed to the cyanate group, -O-C#N).	2.06	1	0
1,n(2)-propanodeoxyguanosine 1,N(2)-propanodeoxyguanosine: structure & RN given in first source	2.01	1	0	carbohydrate derivative; nucleobase-containing molecular entity
3,4-epoxybutane-1,2-diol 3,4-epoxybutane-1,2-diol: a butadiene metabolite	5.13	14	0
carbene carbene: electrically neutral species H2C: and its derivatives, in which the carbon is covalently bonded to two univalent groups of any kind or a divalent group and bears two nonbonding electrons; carbene is the name of the parent hydride :CH2 ; hence, the name dichlorocarbene for :CCl2. However, names for acyclic and cyclic hydrocarbons containing one or more divalent carbon atoms are derived from the name of the corresponding all-4-hydrocarbon using the suffix -ylidene; methylene carbene also available. carbene : The electrically neutral species H2C(2.) and its derivatives, in which the carbon is covalently bonded to two univalent groups of any kind or a divalent group and bears two nonbonding electrons, which may be spin-paired (singlet state) or spin-non-paired (triplet state).	2.46	2	0	carbene; methanediyl
fullerene c60 Fullerenes: A polyhedral CARBON structure composed of around 60-80 carbon atoms in pentagon and hexagon configuration. They are named after Buckminster Fuller because of structural resemblance to geodesic domes. Fullerenes can be made in high temperature such as arc discharge in an inert atmosphere.. fullerene : A compound composed solely of an even number of carbon atoms, which form a cage-like fused-ring polycyclic system with twelve five-membered rings and the rest six-membered rings. The term has been broadened to include any closed cage structure consisting entirely of three-coordinate carbon atoms.	2.13	1	0	fullerene	geroprotector
cyclopropenone cyclopropenone: structure in first source. cyclopropenone : Three-membered alicyclic ketones containing a single C=C double bond.	8.31	1	0
cdri 81-470 [no description available]	2.04	1	0
hydroxyl radical Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent.	2.73	3	0	oxygen hydride; oxygen radical; reactive oxygen species
triflimide triflimide: structure in first source	2.05	1	0
4-oxopentanal 4-oxopentanal: an indoor pollutant; structure in first source. 4-oxopentanal : A ketoaldehyde that is pentanal substituted by an oxo group at position 4.	2.15	1	0	ketoaldehyde	metabolite
lignin Lignin: The most abundant natural aromatic organic polymer found in all vascular plants. Lignin together with cellulose and hemicellulose are the major cell wall components of the fibers of all wood and grass species. Lignin is composed of coniferyl, p-coumaryl, and sinapyl alcohols in varying ratios in different plant species. (From Merck Index, 11th ed). lignin : A polyphenylpropanoid derived from three monolignol monomers: trans-p-coumaryl alcohol, coniferol and trans-sinapyl alcohol. There is extensive cross-linking and no defined primary structure.	2.69	2	0
aflatoxin b1 Aflatoxin B1: A potent hepatotoxic and hepatocarcinogenic mycotoxin produced by the Aspergillus flavus group of fungi. It is also mutagenic, teratogenic, and causes immunosuppression in animals. It is found as a contaminant in peanuts, cottonseed meal, corn, and other grains. The mycotoxin requires epoxidation to aflatoxin B1 2,3-oxide for activation. Microsomal monooxygenases biotransform the toxin to the less toxic metabolites aflatoxin M1 and Q1.. aflatoxin B1 : An aflatoxin having a tetrahydrocyclopenta[c]furo[3',2':4,5]furo[2,3-h]chromene skeleton with oxygen functionality at positions 1, 4 and 11.	4.03	2	0	aflatoxin; aromatic ether; aromatic ketone	carcinogenic agent; human metabolite
yh 1885 YH 1885: proton pump inhibitor; structure in first source	2.04	1	0
benzofurans Benzofurans: Compounds that contain a BENZENE ring fused to a furan ring.	3.08	1	0
2-oxindole 2-oxindole: RN given refers to parent cpd; structure. indolin-2-one : An indolinone carrying an oxo group at position 2.	2.11	1	0	gamma-lactam; indolinone
glycogen glycogen : A polydisperse, highly branched glucan composed of chains of D-glucopyranose residues in alpha(1->4) glycosidic linkage, joined together by alpha(1->6) glycosidic linkages. A small number of alpha(1->3) glycosidic linkages and some cumulative alpha(1->6) links also may occur. The branches in glycogen typically contain 8 to 12 glucose residues.	6.93	1	0
(+)-limonene (4R)-limonene : An optically active form of limonene having (4R)-configuration.	2.05	1	0	limonene	plant metabolite
quinidine Quinidine: An optical isomer of quinine, extracted from the bark of the CHINCHONA tree and similar plant species. This alkaloid dampens the excitability of cardiac and skeletal muscles by blocking sodium and potassium currents across cellular membranes. It prolongs cellular ACTION POTENTIALS, and decreases automaticity. Quinidine also blocks muscarinic and alpha-adrenergic neurotransmission.. quinidine : A cinchona alkaloid consisting of cinchonine with the hydrogen at the 6-position of the quinoline ring substituted by methoxy.	2.04	1	0	cinchona alkaloid	alpha-adrenergic antagonist; anti-arrhythmia drug; antimalarial; drug allergen; EC 1.14.13.181 (13-deoxydaunorubicin hydroxylase) inhibitor; EC 3.6.3.44 (xenobiotic-transporting ATPase) inhibitor; muscarinic antagonist; P450 inhibitor; potassium channel blocker; sodium channel blocker
cocaine Cocaine: An alkaloid ester extracted from the leaves of plants including coca. It is a local anesthetic and vasoconstrictor and is clinically used for that purpose, particularly in the eye, ear, nose, and throat. It also has powerful central nervous system effects similar to the amphetamines and is a drug of abuse. Cocaine, like amphetamines, acts by multiple mechanisms on brain catecholaminergic neurons; the mechanism of its reinforcing effects is thought to involve inhibition of dopamine uptake.. cocaine : A tropane alkaloid obtained from leaves of the South American shrub Erythroxylon coca.	2.04	1	0	benzoate ester; methyl ester; tertiary amino compound; tropane alkaloid	adrenergic uptake inhibitor; central nervous system stimulant; dopamine uptake inhibitor; environmental contaminant; local anaesthetic; mouse metabolite; plant metabolite; serotonin uptake inhibitor; sodium channel blocker; sympathomimetic agent; vasoconstrictor agent; xenobiotic
zithromax Azithromycin: A semi-synthetic macrolide antibiotic structurally related to ERYTHROMYCIN. It has been used in the treatment of Mycobacterium avium intracellulare infections, toxoplasmosis, and cryptosporidiosis.. azithromycin : A macrolide antibiotic useful for the treatment of bacterial infections.	2.04	1	0	macrolide antibiotic	antibacterial drug; environmental contaminant; xenobiotic
2-butenal crotonaldehyde : An enal consisting of propene having a formyl group at the 1-position.	4.66	6	1	enal
imidazolidines [no description available]	3.51	1	0	azacycloalkane; imidazolidines; saturated organic heteromonocyclic parent
azaserine Azaserine: Antibiotic substance produced by various Streptomyces species. It is an inhibitor of enzymatic activities that involve glutamine and is used as an antineoplastic and immunosuppressive agent.. azaserine : A carboxylic ester resulting from the formal condensation of the carboxy group of diazoacetic acid with the alcoholic hydroxy group of L-serine. An antibiotic produced by a Streptomyces species.	1.94	1	0	carboxylic ester; diazo compound; L-serine derivative; non-proteinogenic L-alpha-amino acid	antifungal agent; antimetabolite; antimicrobial agent; antineoplastic agent; glutamine antagonist; immunosuppressive agent; metabolite
glycosides [no description available]	2.03	1	0
retinaldehyde Retinaldehyde: A diterpene derived from the carotenoid VITAMIN A which functions as the active component of the visual cycle. It is the prosthetic group of RHODOPSIN (i.e., covalently bonded to ROD OPSIN as 11-cis-retinal). When stimulated by visible light, rhodopsin transforms this cis-isomer of retinal to the trans-isomer (11-trans-retinal). This transformation straightens-out the bend of the retinal molecule and causes a change in the shape of rhodopsin triggering the visual process. A series of energy-requiring enzyme-catalyzed reactions convert the 11-trans-retinal back to the cis-isomer.. all-trans-retinal : A retinal in which all four exocyclic double bonds have E- (trans-) geometry.	2.04	1	0	retinal; vitamin A	gap junctional intercellular communication inhibitor; human metabolite; mouse metabolite
stilbenes Stilbenes: Organic compounds that contain 1,2-diphenylethylene as a functional group.. trans-stilbene : The trans-isomer of stilbene.	2.1	1	0	stilbene
sesquiterpenes [no description available]	2.15	1	0
cotinine Cotinine: The N-glucuronide conjugate of cotinine is a major urinary metabolite of NICOTINE. It thus serves as a biomarker of exposure to tobacco SMOKING. It has CNS stimulating properties.. (-)-cotinine : An N-alkylpyrrolidine that consists of N-methylpyrrolidinone bearing a pyridin-3-yl substituent at position C-5 (the 5S-enantiomer). It is an alkaloid commonly found in Nicotiana tabacum.	2.04	1	0	N-alkylpyrrolidine; pyridines; pyrrolidin-2-ones; pyrrolidine alkaloid	antidepressant; biomarker; human xenobiotic metabolite; plant metabolite
capsaicin ALGRX-4975: an injectable capsaicin (TRPV1 receptor agonist) formulation for longlasting pain relief. capsaicinoid : A family of aromatic fatty amides produced as secondary metabolites by chilli peppers.	2.05	1	0	capsaicinoid	non-narcotic analgesic; TRPV1 agonist; voltage-gated sodium channel blocker
terbinafine [no description available]	2.04	1	0	acetylenic compound; allylamine antifungal drug; enyne; naphthalenes; tertiary amine	EC 1.14.13.132 (squalene monooxygenase) inhibitor; P450 inhibitor; sterol biosynthesis inhibitor
longifolene longifolene: from plant products; RN given refers to (1S-(1alpha,3abeta,4alpha,8abeta))-isomer; structure given in first source	2.15	1	0	longifolene
thioguanine anhydrous Thioguanine: An antineoplastic compound which also has antimetabolite action. The drug is used in the therapy of acute leukemia.. tioguanine : A 2-aminopurine that is the 6-thiono derivative of 2-amino-1,9-dihydro-6H-purine. Incorporates into DNA and inhibits synthesis. Used in the treatment of leukaemia.	1.98	1	0	2-aminopurines	anticoronaviral agent; antimetabolite; antineoplastic agent
ethylenethiourea Ethylenethiourea: A degradation product of ethylenebis(dithiocarbamate) fungicides. It has been found to be carcinogenic and to cause THYROID hyperplasia.	2.05	1	0	imidazolidines
digoxin Digoxin: A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666). digoxin : A cardenolide glycoside that is digitoxin beta-hydroxylated at C-12. A cardiac glycoside extracted from the foxglove plant, Digitalis lanata, it is used to control ventricular rate in atrial fibrillation and in the management of congestive heart failure with atrial fibrillation, but the margin between toxic and therapeutic doses is small.	2.04	1	0	cardenolide glycoside; steroid saponin	anti-arrhythmia drug; cardiotonic drug; EC 3.6.3.9 (Na(+)/K(+)-transporting ATPase) inhibitor; epitope
nadp [no description available]	2.38	2	0
thiopental Thiopental: A barbiturate that is administered intravenously for the induction of general anesthesia or for the production of complete anesthesia of short duration.. thiopental : A barbiturate, the structure of which is that of 2-thiobarbituric acid substituted at C-5 by ethyl and sec-pentyl groups.	2.04	1	0	barbiturates	anticonvulsant; drug allergen; environmental contaminant; intravenous anaesthetic; sedative; xenobiotic
lithium Lithium: An element in the alkali metals family. It has the atomic symbol Li, atomic number 3, and atomic weight [6.938; 6.997]. Salts of lithium are used in treating BIPOLAR DISORDER.	2.46	2	0	alkali metal atom
cobaltous chloride cobaltous chloride: RN given refers to unlabeled cpd; RN in Chemline for cobalt trichloride: 10241-04-0; RN for 60-labeled cpd: 14543-09-0; RN for 57-labeled cpd: 164113-89-1; RN for 58-labeled cpd: 29377-09-1; structure. cobalt dichloride : A cobalt salt in which the cobalt metal is in the +2 oxidation state and the counter-anion is chloride. It is used as an indicator for water in desiccants.	2.21	1	0	cobalt salt; inorganic chloride	allergen; calcium channel blocker; sensitiser; two-colour indicator
nitrogen dioxide Nitrogen Dioxide: Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.	3.12	5	0	nitrogen oxide
calixarenes Calixarenes: Phenolic metacyclophanes derived from condensation of PHENOLS and ALDEHYDES. The name derives from the vase-like molecular structures. A bracketed [n] indicates the number of aromatic rings.. calixarenes : Originally macrocyclic compounds capable of assuming a basket (or "calix") shaped conformation. They are formed from p-hydrocarbyl phenols and formaldehyde. The term now applies to a variety of derivatives by substitution of the hydrocarbon cyclo{oligo[(1,3-phenylene)methylene]}.. calixarene : A macrocycle composed of 1,3-phenylene groups linked by methylene groups. The number of 1,3-phenylene units in the macrocycle is denoted by the "n" in calix[n]arene name.	2.05	1	0
dimethyldithiocarbamate Dimethyldithiocarbamate: A chemical that acts as a dopamine beta-hydroxylase inhibitor. Its salts are agricultural fungicides. It is inferior to diethyldithiocarbamate as a chelating agent.. dimethyldithiocarbamate : A member of the class of dithiocarbamate anions resulting from the removal of the proton from the dithiocarbamic acid moiety of dimethyldithiocarbamic acid. The major species at pH 7.3.	3.11	5	0	dithiocarbamate anions
bilirubin [no description available]	1.97	1	0	biladienes; dicarboxylic acid	antioxidant; human metabolite; mouse metabolite
pulmicort Budesonide: A glucocorticoid used in the management of ASTHMA, the treatment of various skin disorders, and allergic RHINITIS.. budesonide : A glucocorticoid steroid having a highly oxygenated pregna-1,4-diene structure. It is used mainly in the treatment of asthma and non-infectious rhinitis and for treatment and prevention of nasal polyposis.	2.04	1	0	11beta-hydroxy steroid; 20-oxo steroid; 21-hydroxy steroid; 3-oxo-Delta(1),Delta(4)-steroid; cyclic acetal; glucocorticoid; primary alpha-hydroxy ketone	anti-inflammatory drug; bronchodilator agent; drug allergen
cinnamyl anthranilate [no description available]	2.05	1	0	benzoate ester
lead Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb.	2	1	0	carbon group element atom; elemental lead; metal atom	neurotoxin
aluminum Aluminum: A metallic element that has the atomic number 13, atomic symbol Al, and atomic weight 26.98.	2.05	1	0	boron group element atom; elemental aluminium; metal atom
arsenic Arsenic: A shiny gray element with atomic symbol As, atomic number 33, and atomic weight 75. It occurs throughout the universe, mostly in the form of metallic arsenides. Most forms are toxic. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), arsenic and certain arsenic compounds have been listed as known carcinogens. (From Merck Index, 11th ed)	3.89	4	0	metalloid atom; pnictogen	micronutrient
sulfur Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine.	2.07	1	0	chalcogen; nonmetal atom	macronutrient
phosphorus Phosphorus: A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions.	2.25	1	0	monoatomic phosphorus; nonmetal atom; pnictogen	macronutrient
selenium Selenium: An element with the atomic symbol Se, atomic number 34, and atomic weight 78.97. It is an essential micronutrient for mammals and other animals but is toxic in large amounts. Selenium protects intracellular structures against oxidative damage. It is an essential component of GLUTATHIONE PEROXIDASE.	3.01	1	0	chalcogen; nonmetal atom	micronutrient
mocetinostat mocetinostat: undergoing phase II clinical trials for treatment of cancer. mocetinostat : A benzamide obtained by formal condensation of the carboxy group of 4-({[4-(pyridin-3-yl)pyrimidin-2-yl]amino}methyl)benzoic acid with one of the amino groups of benzene-1,2-diamine. It is an orally active and isotype-selective HDAC inhibitor which exhibits antitumour activity (IC50 = 0.15, 0.29, 1.66 and 0.59 muM for HDAC1, HDAC2, HDAC3 and HDAC11).	4.71	5	0	aminopyrimidine; benzamides; pyridines; secondary amino compound; secondary carboxamide; substituted aniline	antineoplastic agent; apoptosis inducer; autophagy inducer; cardioprotective agent; EC 3.5.1.98 (histone deacetylase) inhibitor; hepatotoxic agent
zeolites [no description available]	2.58	2	0
aluminum oxide Aluminum Oxide: An oxide of aluminum, occurring in nature as various minerals such as bauxite, corundum, etc. It is used as an adsorbent, desiccating agent, and catalyst, and in the manufacture of dental cements and refractories.	7.71	3	0
phosphoramidite phosphoramidite: structure in first source. phosphoramidite : A compound with the general formula (RO)2PNR2. Phosphoramidites can be regarded as phosphites that have an NR2 instead of an OH group, or as amides of phosphorous acid.	2.03	1	0
guanacastepene guanacastepene: isolated from an unidentified fungus; structure in first source	7.03	1	0
sch 442416 SCH 442416: an adenosine A2A receptor ligand	2.04	1	0	triazolopyrimidines
calyciphylline a calyciphylline A: a hexacyclic alkaloid from Daphniphyllum calycinum; structure in first source	2.41	1	0
decabromodiphenyl ethane decabromodiphenyl ethane: structure in first source	3.07	3	0
resorcinarene resorcinarene: structure in first source	2.05	1	0
hydroxymethylvinyl ketone hydroxymethylvinyl ketone: a metabolite of 1,3-butadiene; structure in first source	2.95	4	0
titanocene titanocene: C10-H10-Ti. titanocene : A bis(eta(5)-cyclopentadienyl)metal(II) having Ti(II) as the metal(II) species. The parent of the class of titanonocenes.	2.06	1	0
oligonucleotides [no description available]	2.71	3	0
cellulose DEAE-Cellulose: Cellulose derivative used in chromatography, as ion-exchange material, and for various industrial applications.	3.75	2	1	glycoside
chlorophyll a Chlorophyll: Porphyrin derivatives containing magnesium that act to convert light energy in photosynthetic organisms.. chlorophyll : A family of magnesium porphyrins, defined by the presence of a fifth ring beyond the four pyrrole-like rings. The rings can have various side chains which usually include a long phytol chain.	2.38	2	0	chlorophyll; methyl ester	cofactor
methyl orange methyl orange: indictor of pH with strong acids & bases; also used as reagent to form ion pairs with, and thereby isolate, certain compounds from biological material; minor descriptor (75-86); on-line & INDEX MEDICUS search AZO COMPOUNDS (75-86); file maintained to Azo cpds	2.05	1	0
4,4-difluoro-4-bora-3a,4a-diaza-s-indacene [no description available]	2.58	2	0	BODIPY compound
piperidines Piperidines: A family of hexahydropyridines.	2.45	2	0
interleukin-8 Interleukin-8: A member of the CXC chemokine family that plays a role in the regulation of the acute inflammatory response. It is secreted by variety of cell types and induces CHEMOTAXIS of NEUTROPHILS and other inflammatory cells.	2.43	2	0
ascorbic acid Ascorbic Acid: A six carbon compound related to glucose. It is found naturally in citrus fruits and many vegetables. Ascorbic acid is an essential nutrient in human diets, and necessary to maintain connective tissue and bone. Its biologically active form, vitamin C, functions as a reducing agent and coenzyme in several metabolic pathways. Vitamin C is considered an antioxidant.. L-ascorbic acid : The L-enantiomer of ascorbic acid and conjugate acid of L-ascorbate.. L-ascorbate : The L-enantiomer of ascorbate and conjugate base of L-ascorbic acid, arising from selective deprotonation of the 3-hydroxy group. Required for a range of essential metabolic reactions in all animals and plants.. vitamin C : Any member of a group of vitamers that belong to the chemical structural class called butenolides that exhibit biological activity against vitamin C deficiency in animals. The vitamers include L-ascorbic acid and its salt, ionized and oxidized forms.	2.54	2	0	ascorbic acid; vitamin C	coenzyme; cofactor; flour treatment agent; food antioxidant; food colour retention agent; geroprotector; plant metabolite; skin lightening agent
mobiflex tenoxicam : A thienothiazine-derived monocarboxylic acid amide obtained by formal condensation of the carboxy group of 4-hydroxy-2-methylthieno[2,3-e][1,2]thiazine-3-carboxylic acid 1,1-dioxide with the amino group of 2-aminopyridine. Used for the treatment of pain and inflammation in osteoarthritis and rheumatoid arthritis. It is also indicated for short term treatment of acute musculoskeletal disorders including strains, sprains and other soft-tissue injuries.	2.04	1	0	heteroaryl hydroxy compound; monocarboxylic acid amide; pyridines; thienothiazine	antipyretic; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; non-narcotic analgesic; non-steroidal anti-inflammatory drug
warfarin Warfarin: An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide.. warfarin : A racemate comprising equal amounts of (R)- and (S)-warfarin. Extensively used as both an anticoagulant drug and as a pesticide against rats and mice.. 4-hydroxy-3-(3-oxo-1-phenylbutyl)-1-benzopyran-2-one : A member of the class of coumarins that is 4-hydroxycoumarin which is substituted at position 3 by a 1-phenyl-3-oxo-1-butyl group.	2.49	2	0	benzenes; hydroxycoumarin; methyl ketone
cyclin d1 Cyclin D1: Protein encoded by the bcl-1 gene which plays a critical role in regulating the cell cycle. Overexpression of cyclin D1 is the result of bcl-1 rearrangement, a t(11;14) translocation, and is implicated in various neoplasms.	2.44	2	0
nitrophenols Nitrophenols: PHENOLS carrying nitro group substituents.	2.08	1	0
ripostatin a ripostatin A: an inhibitor of eubacterial RNA polymerase; a macrocyclic lactone carbonic acid; isolated from Sorangium cellulosum; structure given in first source	2.08	1	0
vitamin b 12 Vitamin B 12: A cobalt-containing coordination compound produced by intestinal micro-organisms and found also in soil and water. Higher plants do not concentrate vitamin B 12 from the soil and so are a poor source of the substance as compared with animal tissues. INTRINSIC FACTOR is important for the assimilation of vitamin B 12.	3.77	3	0
deoxyguanosine [no description available]	7.44	2	0	purine 2'-deoxyribonucleoside; purines 2'-deoxy-D-ribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
deoxyinosine [no description available]	2.02	1	0	purine 2'-deoxyribonucleoside; purines 2'-deoxy-D-ribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; plant metabolite; Saccharomyces cerevisiae metabolite
guanine [no description available]	4.37	20	0	2-aminopurines; oxopurine; purine nucleobase	algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
inosine [no description available]	2.02	1	0	inosines; purines D-ribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
pheophytin a pheophytin a: structure given in first source; RN given refers to (3S-(3alpha(2E,7S,11S),4beta,21beta))-isomer	2.13	1	0
olanzapine Olanzapine: A benzodiazepine derivative that binds SEROTONIN RECEPTORS; MUSCARINIC RECEPTORS; HISTAMINE H1 RECEPTORS; ADRENERGIC ALPHA-1 RECEPTORS; and DOPAMINE RECEPTORS. It is an antipsychotic agent used in the treatment of SCHIZOPHRENIA; BIPOLAR DISORDER; and MAJOR DEPRESSIVE DISORDER; it may also reduce nausea and vomiting in patients undergoing chemotherapy.. olanzapine : A benzodiazepine that is 10H-thieno[2,3-b][1,5]benzodiazepine substituted by a methyl group at position 2 and a 4-methylpiperazin-1-yl group at position 4.	2.04	1	0	benzodiazepine; N-arylpiperazine; N-methylpiperazine	antiemetic; dopaminergic antagonist; histamine antagonist; muscarinic antagonist; second generation antipsychotic; serotonergic antagonist; serotonin uptake inhibitor
methylnitronitrosoguanidine Methylnitronitrosoguanidine: A nitrosoguanidine derivative with potent mutagenic and carcinogenic properties.. N-methyl-N'-nitro-N-nitrosoguanidine : An N-nitroguanidine compound having nitroso and methyl substituents at the N'-position	1.94	1	0	nitroso compound	alkylating agent
8-hydroxy-2'-deoxyguanosine 8-Hydroxy-2'-Deoxyguanosine: Common oxidized form of deoxyguanosine in which C-8 position of guanine base has a carbonyl group.. 8-hydroxy-2'-deoxyguanosine : Guanosine substituted at the purine 8-position by a hydroxy group. It is used as a biomarker of oxidative DNA damage.	2.05	1	0	guanosines	biomarker
p-hydroxybenzylideneimidazolinone p-hydroxybenzylideneimidazolinone: structure in first source	2.1	1	0
divinyl chlorophyll a divinyl chlorophyll a : A carboxylic ester obtained by formal condensation of the carboxy group of divinyl chlorophyll a with the hydroxy group of (2E,7R,11R)-3,7,11,15-tetramethylhexadec-2-en-1-ol.	2.13	1	0
acetylcellulose acetylcellulose: coating compound. cellulose acetate : A glucan derivative obtained through the esterification of cellulose by acetic anhydride or acetic acid, resulting in the substitution of some of the hydroxy groups of cellulose by acetyl groups. It is used in a variety of applications including base material for photographic film, clothing, membrane filters, coatings, food packaging, and as a frame material for eyeglasses.	3.41	1	1
neaumycin b neaumycin B: isolated from the soil actinomycete Streptomyces sp. NEAU-x211; structure in first source	2.41	1	0
phosphorus radioisotopes Phosphorus Radioisotopes: Unstable isotopes of phosphorus that decay or disintegrate emitting radiation. P atoms with atomic weights 28-34 except 31 are radioactive phosphorus isotopes.	2.91	4	0
pyrimidinones Pyrimidinones: Heterocyclic compounds known as 2-pyrimidones (or 2-hydroxypyrimidines) and 4-pyrimidones (or 4-hydroxypyrimidines) with the general formula C4H4N2O.	3.51	1	0
phenanthrenes Phenanthrenes: POLYCYCLIC AROMATIC HYDROCARBONS composed of three fused BENZENE rings.. phenanthrenes : Any benzenoid aromatic compound that consists of a phenanthrene skeleton and its substituted derivatives thereof.	2.03	1	0

Condition	Relationship Strength	Studies	Trials
Cancer of Lung [description not available]	6.88	25	1
Lung Neoplasms Tumors or cancer of the LUNG.	6.88	25	1
Body Weight The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	4.79	12	0
Weight Gain Increase in BODY WEIGHT over existing weight.	2.31	1	0
Bladder Cancer [description not available]	8.02	4	0
Leucocythaemia [description not available]	7.68	32	0
Urinary Bladder Neoplasms Tumors or cancer of the URINARY BLADDER.	3.02	4	0
Leukemia A progressive, malignant disease of the blood-forming organs, characterized by distorted proliferation and development of leukocytes and their precursors in the blood and bone marrow. Leukemias were originally termed acute or chronic based on life expectancy but now are classified according to cellular maturity. Acute leukemias consist of predominately immature cells; chronic leukemias are composed of more mature cells. (From The Merck Manual, 2006)	7.68	32	0
Blood Pressure, High [description not available]	2.41	1	0
Hypertension Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.	2.41	1	0
Benign Neoplasms [description not available]	9.35	49	0
Neoplasms New abnormal growth of tissue. Malignant neoplasms show a greater degree of anaplasia and have the properties of invasion and metastasis, compared to benign neoplasms.	9.35	49	0
Hay Fever [description not available]	4.02	9	0
Rhinitis, Allergic, Seasonal Allergic rhinitis that occurs at the same time every year. It is characterized by acute CONJUNCTIVITIS with lacrimation and ITCHING, and regarded as an allergic condition triggered by specific ALLERGENS.	4.02	9	0
Insulin Sensitivity [description not available]	2.6	1	0
Prediabetes [description not available]	7.6	1	0
Insulin Resistance Diminished effectiveness of INSULIN in lowering blood sugar levels: requiring the use of 200 units or more of insulin per day to prevent HYPERGLYCEMIA or KETOSIS.	2.6	1	0
Prediabetic State The time period before the development of symptomatic diabetes. For example, certain risk factors can be observed in subjects who subsequently develop INSULIN RESISTANCE as in type 2 diabetes (DIABETES MELLITUS, TYPE 2).	2.6	1	0
Health Care Associated Infection [description not available]	2.6	1	0
Infections, Staphylococcal [description not available]	2.6	1	0
Cross Infection Any infection which a patient contracts in a health-care institution.	2.6	1	0
Staphylococcal Infections Infections with bacteria of the genus STAPHYLOCOCCUS.	2.6	1	0
Fatty Liver, Nonalcoholic [description not available]	2.6	1	0
Non-alcoholic Fatty Liver Disease Fatty liver finding without excessive ALCOHOL CONSUMPTION.	2.6	1	0
Chromosomal Translocation [description not available]	4.19	6	0
Diffuse Mixed Small and Large Cell Lymphoma [description not available]	5.57	6	1
Lymphoma, Non-Hodgkin Any of a group of malignant tumors of lymphoid tissue that differ from HODGKIN DISEASE, being more heterogeneous with respect to malignant cell lineage, clinical course, prognosis, and therapy. The only common feature among these tumors is the absence of giant REED-STERNBERG CELLS, a characteristic of Hodgkin's disease.	5.57	6	1
Disease, Pulmonary [description not available]	2.25	1	0
Diseases, Occupational [description not available]	10.69	50	1
Lung Diseases Pathological processes involving any part of the LUNG.	2.25	1	0
Cardiovascular Diseases Pathological conditions involving the CARDIOVASCULAR SYSTEM including the HEART; the BLOOD VESSELS; or the PERICARDIUM.	3.41	2	0
Electrolytes Substances that dissociate into two or more ions, to some extent, in water. Solutions of electrolytes thus conduct an electric current and can be decomposed by it (ELECTROLYSIS). (Grant & Hackh's Chemical Dictionary, 5th ed)	2.25	1	0
Dehydration The condition that results from excessive loss of water from a living organism.	2.31	1	0
Breast Cancer [description not available]	2.31	1	0
Breast Neoplasms Tumors or cancer of the human BREAST.	2.31	1	0
Kahler Disease [description not available]	2.31	1	0
B-Cell Lymphoma [description not available]	2.31	1	0
Multiple Myeloma A malignancy of mature PLASMA CELLS engaging in monoclonal immunoglobulin production. It is characterized by hyperglobulinemia, excess Bence-Jones proteins (free monoclonal IMMUNOGLOBULIN LIGHT CHAINS) in the urine, skeletal destruction, bone pain, and fractures. Other features include ANEMIA; HYPERCALCEMIA; and RENAL INSUFFICIENCY.	2.31	1	0
Lymphoma, B-Cell A group of heterogeneous lymphoid tumors generally expressing one or more B-cell antigens or representing malignant transformations of B-lymphocytes.	2.31	1	0
Airflow Obstruction, Chronic [description not available]	2.47	2	0
Pulmonary Disease, Chronic Obstructive A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.	2.47	2	0
Bacterial Disease [description not available]	2.15	1	0
Bacterial Infections Infections by bacteria, general or unspecified.	2.15	1	0
Gas Poisoning Poisoning that results from exposure to gases such as CARBON MONOXIDE; NOBLE GASES; OXYGEN; or NATURAL GAS.	2.08	1	0
Sensitivity and Specificity Binary classification measures to assess test results. Sensitivity or recall rate is the proportion of true positives. Specificity is the probability of correctly determining the absence of a condition. (From Last, Dictionary of Epidemiology, 2d ed)	3.9	12	0
Acute Lymphoid Leukemia [description not available]	3.43	2	0
Acute Myelogenous Leukemia [description not available]	3.4	2	0
Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	6.01	10	0
Leukemia, Myeloid, Acute Clonal expansion of myeloid blasts in bone marrow, blood, and other tissue. Myeloid leukemias develop from changes in cells that normally produce NEUTROPHILS; BASOPHILS; EOSINOPHILS; and MONOCYTES.	3.4	2	0
Precursor Cell Lymphoblastic Leukemia-Lymphoma A neoplasm characterized by abnormalities of the lymphoid cell precursors leading to excessive lymphoblasts in the marrow and other organs. It is the most common cancer in children and accounts for the vast majority of all childhood leukemias.	3.43	2	0
Genome Instability [description not available]	2.1	1	0
Cerebral Primitive Neuroectodermal Tumor [description not available]	2.11	1	0
Anaplastic Astrocytoma [description not available]	2.11	1	0
Arachnoidal Cerebellar Sarcoma, Circumscribed [description not available]	2.11	1	0
Central Nervous System Neoplasm [description not available]	2.53	2	0
Anaplastic Ependymoma [description not available]	2.11	1	0
Astrocytoma Neoplasms of the brain and spinal cord derived from glial cells which vary from histologically benign forms to highly anaplastic and malignant tumors. Fibrillary astrocytomas are the most common type and may be classified in order of increasing malignancy (grades I through IV). In the first two decades of life, astrocytomas tend to originate in the cerebellar hemispheres; in adults, they most frequently arise in the cerebrum and frequently undergo malignant transformation. (From Devita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2013-7; Holland et al., Cancer Medicine, 3d ed, p1082)	2.11	1	0
Ependymoma Glioma derived from EPENDYMOGLIAL CELLS that tend to present as malignant intracranial tumors in children and as benign intraspinal neoplasms in adults. It may arise from any level of the ventricular system or central canal of the spinal cord. Intracranial ependymomas most frequently originate in the FOURTH VENTRICLE and histologically are densely cellular tumors which may contain ependymal tubules and perivascular pseudorosettes. Spinal ependymomas are usually benign papillary or myxopapillary tumors. (From DeVita et al., Principles and Practice of Oncology, 5th ed, p2018; Escourolle et al., Manual of Basic Neuropathology, 2nd ed, pp28-9)	2.11	1	0
Medulloblastoma A malignant neoplasm that may be classified either as a glioma or as a primitive neuroectodermal tumor of childhood (see NEUROECTODERMAL TUMOR, PRIMITIVE). The tumor occurs most frequently in the first decade of life with the most typical location being the cerebellar vermis. Histologic features include a high degree of cellularity, frequent mitotic figures, and a tendency for the cells to organize into sheets or form rosettes. Medulloblastoma have a high propensity to spread throughout the craniospinal intradural axis. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2060-1)	2.11	1	0
Central Nervous System Neoplasms Benign and malignant neoplastic processes that arise from or secondarily involve the brain, spinal cord, or meninges.	2.53	2	0
Neuroectodermal Tumors, Primitive A group of malignant tumors of the nervous system that feature primitive cells with elements of neuronal and/or glial differentiation. Use of this term is limited by some authors to central nervous system tumors and others include neoplasms of similar origin which arise extracranially (i.e., NEUROECTODERMAL TUMORS, PRIMITIVE, PERIPHERAL). This term is also occasionally used as a synonym for MEDULLOBLASTOMA. In general, these tumors arise in the first decade of life and tend to be highly malignant. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, p2059)	2.11	1	0
Chromosome-Defective Micronuclei [description not available]	4.21	17	0
Ph 1 Chromosome [description not available]	2.11	1	0
Granulocytic Leukemia, Chronic [description not available]	2.49	2	0
Leukemia, Myelogenous, Chronic, BCR-ABL Positive Clonal hematopoetic disorder caused by an acquired genetic defect in PLURIPOTENT STEM CELLS. It starts in MYELOID CELLS of the bone marrow, invades the blood and then other organs. The condition progresses from a stable, more indolent, chronic phase (LEUKEMIA, MYELOID, CHRONIC PHASE) lasting up to 7 years, to an advanced phase composed of an accelerated phase (LEUKEMIA, MYELOID, ACCELERATED PHASE) and BLAST CRISIS.	2.49	2	0
Abnormalities, Autosome [description not available]	6.66	24	0
Experimental Lung Inflammation Inflammation of any part, segment or lobe, of the lung parenchyma.	2.13	1	0
Pneumonia Infection of the lung often accompanied by inflammation.	2.13	1	0
Aneuploid [description not available]	7.44	2	0
Delayed Effects, Prenatal Exposure [description not available]	2.13	1	0
Bone Cancer [description not available]	2.15	1	0
Bone Neoplasms Tumors or cancer located in bone tissue or specific BONES.	2.15	1	0
Benign Neoplasms, Brain [description not available]	3.84	4	0
Brain Neoplasms Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.	3.84	4	0
Aging The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.	2.45	2	0
Atrophy Decrease in the size of a cell, tissue, organ, or multiple organs, associated with a variety of pathological conditions such as abnormal cellular changes, ischemia, malnutrition, or hormonal changes.	2.97	1	0
Chromosomal Breakage [description not available]	2.05	1	0
Cell Transformation, Neoplastic Cell changes manifested by escape from control mechanisms, increased growth potential, alterations in the cell surface, karyotypic abnormalities, morphological and biochemical deviations from the norm, and other attributes conferring the ability to invade, metastasize, and kill.	2.42	2	0
Acetonemia [description not available]	2.06	1	0
B-Cell Chronic Lymphocytic Leukemia [description not available]	2.41	2	0
Leukemia, Lymphocytic, Chronic, B-Cell A chronic leukemia characterized by abnormal B-lymphocytes and often generalized lymphadenopathy. In patients presenting predominately with blood and bone marrow involvement it is called chronic lymphocytic leukemia (CLL); in those predominately with enlarged lymph nodes it is called small lymphocytic lymphoma. These terms represent spectrums of the same disease.	2.41	2	0
Smoking Cessation Discontinuing the habit of SMOKING.	2.06	1	0
Acute Liver Injury, Drug-Induced [description not available]	2.06	1	0
Liver Steatosis [description not available]	2.06	1	0
Fatty Liver Lipid infiltration of the hepatic parenchymal cells resulting in a yellow-colored liver. The abnormal lipid accumulation is usually in the form of TRIGLYCERIDES, either as a single large droplet or multiple small droplets. Fatty liver is caused by an imbalance in the metabolism of FATTY ACIDS.	2.06	1	0
Chemical and Drug Induced Liver Injury A spectrum of clinical liver diseases ranging from mild biochemical abnormalities to ACUTE LIVER FAILURE, caused by drugs, drug metabolites, herbal and dietary supplements and chemicals from the environment.	2.06	1	0
Chromosomal Instability An increased tendency to acquire CHROMOSOME ABERRATIONS when various processes involved in chromosome replication, repair, or segregation are dysfunctional.	2.07	1	0
Adenocarcinoma, Basal Cell [description not available]	2.68	3	0
Experimental Mammary Neoplasms [description not available]	3.82	4	0
Adenocarcinoma A malignant epithelial tumor with a glandular organization.	7.68	3	0
Cancer of Liver [description not available]	4.28	4	0
Liver Neoplasms Tumors or cancer of the LIVER.	4.28	4	0
Poisoning Used with drugs, chemicals, and industrial materials for human or animal poisoning, acute or chronic, whether the poisoning is accidental, occupational, suicidal, by medication error, or by environmental exposure.	2.93	1	0
Contact Dermatitis [description not available]	2.34	2	0
Dermatitis Any inflammation of the skin.	2.34	2	0
Dermatitis, Contact A type of acute or chronic skin reaction in which sensitivity is manifested by reactivity to materials or substances coming in contact with the skin. It may involve allergic or non-allergic mechanisms.	2.34	2	0
Polyarthritis [description not available]	2.84	4	0
Rheumatoid Arthritis [description not available]	2.84	4	0
Arthritis Acute or chronic inflammation of JOINTS.	2.84	4	0
Arthritis, Rheumatoid A chronic systemic disease, primarily of the joints, marked by inflammatory changes in the synovial membranes and articular structures, widespread fibrinoid degeneration of the collagen fibers in mesenchymal tissues, and by atrophy and rarefaction of bony structures. Etiology is unknown, but autoimmune mechanisms have been implicated.	2.84	4	0
Nervous System Disorders [description not available]	1.93	1	0
Nervous System Diseases Diseases of the central and peripheral nervous system. This includes disorders of the brain, spinal cord, cranial nerves, peripheral nerves, nerve roots, autonomic nervous system, neuromuscular junction, and muscle.	1.93	1	0
Nerve Root Avulsion [description not available]	2.85	1	0
Polyradiculitis [description not available]	2.85	1	0
Polyradiculopathy Disease or injury involving multiple SPINAL NERVE ROOTS. Polyradiculitis refers to inflammation of multiple spinal nerve roots.	2.85	1	0
Radiculopathy Disease involving a spinal nerve root (see SPINAL NERVE ROOTS) which may result from compression related to INTERVERTEBRAL DISK DISPLACEMENT; SPINAL CORD INJURIES; SPINAL DISEASES; and other conditions. Clinical manifestations include radicular pain, weakness, and sensory loss referable to structures innervated by the involved nerve root.	2.85	1	0
Erythermalgia [description not available]	1.92	1	0
Erythromelalgia A peripheral arterial disease that is characterized by the triad of ERYTHEMA, burning PAIN, and increased SKIN TEMPERATURE of the extremities (or red, painful extremities). Erythromelalgia may be classified as primary or idiopathic, familial or non-familial. Secondary erythromelalgia is associated with other diseases, the most common being MYELOPROLIFERATIVE DISORDERS.	1.92	1	0
Innate Inflammatory Response [description not available]	2.69	3	0
Inflammation A pathological process characterized by injury or destruction of tissues caused by a variety of cytologic and chemical reactions. It is usually manifested by typical signs of pain, heat, redness, swelling, and loss of function.	2.69	3	0
Deficiency, Vitamin B 12 [description not available]	2.02	1	0
Vitamin B 12 Deficiency A nutritional condition produced by a deficiency of VITAMIN B 12 in the diet, characterized by megaloblastic anemia. Since vitamin B 12 is not present in plants, humans have obtained their supply from animal products, from multivitamin supplements in the form of pills, and as additives to food preparations. A wide variety of neuropsychiatric abnormalities is also seen in vitamin B 12 deficiency and appears to be due to an undefined defect involving myelin synthesis. (From Cecil Textbook of Medicine, 19th ed, p848)	2.02	1	0
Glial Cell Tumors [description not available]	2.02	1	0
Glioma Benign and malignant central nervous system neoplasms derived from glial cells (i.e., astrocytes, oligodendrocytes, and ependymocytes). Astrocytes may give rise to astrocytomas (ASTROCYTOMA) or glioblastoma multiforme (see GLIOBLASTOMA). Oligodendrocytes give rise to oligodendrogliomas (OLIGODENDROGLIOMA) and ependymocytes may undergo transformation to become EPENDYMOMA; CHOROID PLEXUS NEOPLASMS; or colloid cysts of the third ventricle. (From Escourolle et al., Manual of Basic Neuropathology, 2nd ed, p21)	2.02	1	0
Neuroblastoma A common neoplasm of early childhood arising from neural crest cells in the sympathetic nervous system, and characterized by diverse clinical behavior, ranging from spontaneous remission to rapid metastatic progression and death. This tumor is the most common intraabdominal malignancy of childhood, but it may also arise from thorax, neck, or rarely occur in the central nervous system. Histologic features include uniform round cells with hyperchromatic nuclei arranged in nests and separated by fibrovascular septa. Neuroblastomas may be associated with the opsoclonus-myoclonus syndrome. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2099-2101; Curr Opin Oncol 1998 Jan;10(1):43-51)	2.02	1	0
Blood Diseases [description not available]	2.42	2	0
Hematologic Diseases Disorders of the blood and blood forming tissues.	2.42	2	0
Grippe [description not available]	2.03	1	0
Influenza, Human An acute viral infection in humans involving the respiratory tract. It is marked by inflammation of the NASAL MUCOSA; the PHARYNX; and conjunctiva, and by headache and severe, often generalized, myalgia.	2.03	1	0
Infections, Respiratory [description not available]	2.03	1	0
Respiratory Tract Infections Invasion of the host RESPIRATORY SYSTEM by microorganisms, usually leading to pathological processes or diseases.	2.03	1	0
Leukemia, Lymphocytic [description not available]	2.03	1	0
Granulocytic Leukemia [description not available]	2.03	1	0
Leukemia, Lymphoid Leukemia associated with HYPERPLASIA of the lymphoid tissues and increased numbers of circulating malignant LYMPHOCYTES and lymphoblasts.	2.03	1	0
Leukemia, Myeloid Form of leukemia characterized by an uncontrolled proliferation of the myeloid lineage and their precursors (MYELOID PROGENITOR CELLS) in the bone marrow and other sites.	2.03	1	0
Central Nervous System Disease [description not available]	2.03	1	0
Central Nervous System Diseases Diseases of any component of the brain (including the cerebral hemispheres, diencephalon, brain stem, and cerebellum) or the spinal cord.	2.03	1	0
Cardiac Neurosis [description not available]	1.96	1	0
Cancer of Stomach [description not available]	4.62	6	1
Diffuse Large B-Cell Lymphoma [description not available]	3.37	1	1
Stomach Neoplasms Tumors or cancer of the STOMACH.	9.62	6	1
Lymphoma, Large B-Cell, Diffuse Malignant lymphoma composed of large B lymphoid cells whose nuclear size can exceed normal macrophage nuclei, or more than twice the size of a normal lymphocyte. The pattern is predominantly diffuse. Most of these lymphomas represent the malignant counterpart of B-lymphocytes at midstage in the process of differentiation.	3.37	1	1
Experimental Neoplasms [description not available]	7.73	32	0
Rodent Diseases Diseases of rodents of the order RODENTIA. This term includes diseases of Sciuridae (squirrels), Geomyidae (gophers), Heteromyidae (pouched mice), Castoridae (beavers), Cricetidae (rats and mice), Muridae (Old World rats and mice), Erethizontidae (porcupines), and Caviidae (guinea pigs).	1.98	1	0
Fetal Death Death of the developing young in utero. BIRTH of a dead FETUS is STILLBIRTH.	2.39	2	0
Abnormalities, Drug-Induced Congenital abnormalities caused by medicinal substances or drugs of abuse given to or taken by the mother, or to which she is inadvertently exposed during the manufacture of such substances. The concept excludes abnormalities resulting from exposure to non-medicinal chemicals in the environment.	3.6	3	0
Germinoblastoma [description not available]	6.08	21	0
Lymphoma A general term for various neoplastic diseases of the lymphoid tissue.	6.08	21	0
Arteriosclerosis Thickening and loss of elasticity of the walls of ARTERIES of all sizes. There are many forms classified by the types of lesions and arteries involved, such as ATHEROSCLEROSIS with fatty lesions in the ARTERIAL INTIMA of medium and large muscular arteries.	2.39	2	0
T-Cell Lymphoma [description not available]	1.99	1	0
Lymphoma, T-Cell A group of heterogeneous lymphoid tumors representing malignant transformations of T-lymphocytes.	1.99	1	0
Adenocarcinoma, Alveolar [description not available]	1.99	1	0
Hepatocellular Carcinoma [description not available]	1.99	1	0
Experimental Hepatoma [description not available]	2.67	3	0
Abdominal Neoplasms New abnormal growth of tissue in the ABDOMEN.	1.99	1	0
Adenocarcinoma, Bronchiolo-Alveolar A carcinoma derived from epithelium of terminal bronchioles, in which the neoplastic tissue extends along the alveolar walls and grows in small masses within the alveoli. Involvement may be uniformly diffuse and massive, or nodular, or lobular. The neoplastic cells are cuboidal or columnar and form papillary structures. Mucin may be demonstrated in some of the cells and in the material in the alveoli, which also includes denuded cells. Metastases in regional lymph nodes, and in even more distant sites, are known to occur, but are infrequent. (From Stedman, 25th ed)	1.99	1	0
Carcinoma, Transitional Cell A malignant neoplasm derived from TRANSITIONAL EPITHELIAL CELLS, occurring chiefly in the URINARY BLADDER; URETERS; or RENAL PELVIS.	1.99	1	0
Carcinoma, Hepatocellular A primary malignant neoplasm of epithelial liver cells. It ranges from a well-differentiated tumor with EPITHELIAL CELLS indistinguishable from normal HEPATOCYTES to a poorly differentiated neoplasm. The cells may be uniform or markedly pleomorphic, or form GIANT CELLS. Several classification schemes have been suggested.	1.99	1	0
Mesothelioma A tumor derived from mesothelial tissue (peritoneum, pleura, pericardium). It appears as broad sheets of cells, with some regions containing spindle-shaped, sarcoma-like cells and other regions showing adenomatous patterns. Pleural mesotheliomas have been linked to exposure to asbestos. (Dorland, 27th ed)	1.99	1	0
Genetic Diseases [description not available]	2.4	2	0
Genetic Diseases, Inborn Diseases that are caused by genetic mutations present during embryo or fetal development, although they may be observed later in life. The mutations may be inherited from a parent's genome or they may be acquired in utero.	2.4	2	0
Cardiac Death [description not available]	1.99	1	0
Abnormalities, Congenital [description not available]	1.99	1	0
Angiosarcoma [description not available]	9.46	5	0
Cancer of Larynx [description not available]	2.91	1	0
Cancer of Nasopharynx [description not available]	2.91	1	0
Cancer of Nose [description not available]	2.91	1	0
Hemangiosarcoma A rare malignant neoplasm characterized by rapidly proliferating, extensively infiltrating, anaplastic cells derived from blood vessels and lining irregular blood-filled or lumpy spaces. (Stedman, 25th ed)	9.46	5	0
Laryngeal Neoplasms Cancers or tumors of the LARYNX or any of its parts: the GLOTTIS; EPIGLOTTIS; LARYNGEAL CARTILAGES; LARYNGEAL MUSCLES; and VOCAL CORDS.	2.91	1	0
Nasopharyngeal Neoplasms Tumors or cancer of the NASOPHARYNX.	2.91	1	0
Adenoma, Basal Cell [description not available]	2.39	2	0
Carcinoma, Anaplastic [description not available]	2.39	2	0
Neoplasms, Sebaceous Gland [description not available]	2	1	0
Adenoma A benign epithelial tumor with a glandular organization.	2.39	2	0
Carcinoma A malignant neoplasm made up of epithelial cells tending to infiltrate the surrounding tissues and give rise to metastases. It is a histological type of neoplasm and not a synonym for cancer.	2.39	2	0
Cancer of Kidney [description not available]	2	1	0
Animal Mammary Carcinoma [description not available]	2	1	0
Kidney Neoplasms Tumors or cancers of the KIDNEY.	2	1	0
Diathesis [description not available]	2	1	0
Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases.	3.79	2	0
Breast Cancer, Male [description not available]	2	1	0
Breast Neoplasms, Male Any neoplasms of the male breast. These occur infrequently in males in developed countries, the incidence being about 1% of that in females.	2	1	0
Experimental Leukemia [description not available]	4.27	4	0
Cancer of the Thymus [description not available]	2.89	1	0
Thymus Neoplasms Tumors or cancer of the THYMUS GLAND.	2.89	1	0
Cardiac Cancer [description not available]	4.14	6	0
Cancer of Ovary [description not available]	2.66	3	0
Ovarian Neoplasms Tumors or cancer of the OVARY. These neoplasms can be benign or malignant. They are classified according to the tissue of origin, such as the surface EPITHELIUM, the stromal endocrine cells, and the totipotent GERM CELLS.	2.66	3	0
Cocarcinogenesis The combination of two or more different factors in the production of cancer.	1.97	1	0
Fibroma, Shope [description not available]	1.97	1	0
Cancer of Granulosa Cells [description not available]	1.97	1	0
Anemia, Macrocytic Anemia characterized by larger than normal erythrocytes, increased mean corpuscular volume (MCV) and increased mean corpuscular hemoglobin (MCH).	2.37	2	0
Anemia, Megaloblastic A disorder characterized by the presence of ANEMIA, abnormally large red blood cells (megalocytes or macrocytes), and MEGALOBLASTS.	2.37	2	0
Hyperplasia An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.	1.97	1	0
Nasal Diseases [description not available]	1.96	1	0

1,3-butadiene

Description

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Research Demand Index: 64.04

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