4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone profile

4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone: structure; from tobacco smoke [Medical Subject Headings (MeSH), National Library of Medicine, extracted Dec-2023]

ID Source	ID
PubMed CID	47289
CHEMBL ID	2311069
CHEBI ID	32692
SCHEMBL ID	454516
MeSH ID	M0066689

Synonym
4-(n-nitroso-n-methylamino)-1-(3-pyridyl)-1-butanone
4-(methylnitrosamino)-1-(3-pyridyl)-1-(butanone)
4-[methyl(nitroso)amino]-1-(pyridin-3-yl)butan-1-one
nnk (carcinogen)
64091-91-4
4-(n-nitrosomethylamino)-1-(3-pyridyl)butan-1-one
4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone
CHEBI:32692 ,
4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone
NNK ,
4-(n-nitrosomethylamino)-1-(3-pyridyl)-1-butanone
1-butanone, 4-(methylnitrosoamino)-1-(3-pyridinyl)-
4-[methyl(nitroso)amino]-1-pyridin-3-ylbutan-1-one
inchi=1/c10h13n3o2/c1-13(12-15)7-3-5-10(14)9-4-2-6-11-8-9/h2,4,6,8h,3,5,7h2,1h
brn 3548355
4-(methylnitrosoamino)-1-(3-pyridinyl)-1-butanone
ccris 1150
4-(methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone
4-methylnitrosoamino-1-(3-pyridinyl)-1-butanone
4-(n-methyl-n-nitrosoamino)-4-(3-pyridyl)-1-butanone
4-(nitrosoamino-n-methyl)-1-(3-pyridyl)-1-butanone
ketone, 3-pyridyl 3-(n-methyl-n-nitrosamino)propyl
n-methyl-n-nitroso-4-oxo-4-(3-pyridyl)butyl amine
NCGC00163358-01
ozone/nnk
4-(methylnitrosoamino)-1-(3-pyridyl)-1-butanone
nnk cpd
n-methyl-n-(4-oxo-4-pyridin-3-ylbutyl)nitrous amide
64091-50-5
1-butanone, 4-(methylnitrosamino)-1-(3-pyridyl)-
FT-0672061
FT-0672062
4-(nitrosomethylamino)-1-(3-pyridyl)-1-butanone
7s395edo61 ,
unii-7s395edo61
hsdb 7771
FT-0616837
1-butanone,4-(methylnitrosoamino)-1-(3-pyridinyl)-
CHEMBL2311069
SCHEMBL454516
methylnitrosoamino-1-(3-pyridinyl)-1-butanone, 4-
nnk (carcinogen) [hsdb]
4-(n-nitrosomethylamino)-1-(3-pyridyl)-1-butanone [iarc]
4-(n-nitrosomethylamino)-1-(3-pyridinyl)-1-butanone
FLAQQSHRLBFIEZ-UHFFFAOYSA-N
1-butanone, 4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)
4-(1-methyl-2-oxohydrazino)-1-(3-pyridinyl)-1-butanone #
tox21_303771
dtxsid3020881 ,
dtxcid70881
NCGC00357285-01
cas-64091-91-4
AKOS028109857
4-(methylnitrosoamino)-1-(3-pyridinyl)-1-butanone, analytical standard
A50811
n-nitrosonornicotine-ketone
n-methyl-n-(4-oxo-4-(pyridin-3-yl)butyl)nitrous amide ,
4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (nnk)
Q6138931
mfcd00274580
BCP32075
nicotine-derived nitrosamine ketone
SY062201
n-methyl-n-[4-oxo-4-(pyridin-3-yl)butyl]nitrous amide
MS-23132
HY-126477
CS-0104774
4-(n-nitrosomethylamino)-1-(3-pyridyl)-1-butanone (iarc)
4-methylnitrosamino-1,3-pyridyl-1-butanone
4-(methyl(nitroso)amino)-1-(pyridin-3-yl)butan-1-one
4-n-nitrosomethylamino-1-3-pyridyl-1-butanone

Excerpt	Reference	Relevance
" At high concentrations (100-200 micrograms/ml), NNK was significantly toxic to RTE cells."	( Cytotoxicity, genotoxicity and transforming activity of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in rat tracheal epithelial cells. Cunningham, ML; Gray, TE; Nettesheim, P; Zhu, SY, 1991)	0.28
" These results suggest that the toxic effects of NNK and NDMA initiate a regenerative process that occurs faster in rat than in hamster liver."	( DNA single-strand breaks and toxicity induced by 4-(methyl-nitrosamino)-1-(3- pyridyl)-1-butanone or N-nitrosodimethylamine in hamster and rat liver. Castonguay, A; Jorquera, R; Schuller, HM, 1994)	0.29
" The cancer initiating/promoting nature of cigarette smoke can be attributed to its various constituents including nicotine, which is the major psychoactive component, and several other toxic constituents, such as nitrosamines, 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone, and polycyclic aromatic hydrocarbons."	( Interplay between smoking-induced genotoxicity and altered signaling in pancreatic carcinogenesis. Batra, SK; Kaur, S; Kumar, S; Momi, N; Ponnusamy, MP; Wittel, UA, 2012)	0.38
"The tobacco-specific nitrosamine 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is a carcinogenic and ubiquitous environmental pollutant for which toxic activity has been thoroughly investigated in murine models and human tissues."	( Toxicity of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in early development: A wide-scope metabolomics assay in zebrafish embryos. Casado, M; Merino, C; Piña, B; Ramírez, N; Vinaixa, M, 2022)	0.72

Excerpt	Reference	Relevance
" The formation and biological half-life of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL), the major metabolite of NNK, was also studied in these animal species."	( Pharmacokinetics of N'-nitrosonornicotine and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone in laboratory animals. Adams, JD; Carey, KD; Hoffmann, D; Lavoie, EJ; Marshall, MV; O'Mara-Adams, KJ, 1985)	0.27
"Methods were developed to determine the biological half-life of N'-nitrosonornicotine (NNN) and 4-(N-nitrosomethylamino)-1-(3-pyridyl)-1-butanone (NNK) in Syrian golden hamsters and Fischer rats."	( Pharmacokinetics of tobacco-specific N-nitrosamines. Adams, JD; Hoffmann, D; Lavoie, EJ; O'Donnell, M, 1984)	0.27
" Pharmacokinetic parameters were consistent with those observed in previous studies of nitrosamines, and varied predictably with body weight of five species."	( Metabolism of the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone in the patas monkey: pharmacokinetics and characterization of glucuronide metabolites. Anderson, LM; Burak, ES; Carmella, SG; Gombar, CT; Hecht, SS; Jones, AB; Reid-Quinn, CA; Rice, JM; Southers, JL; Trushin, N, 1993)	0.29

Excerpt	Reference	Relevance
"To evaluate the toxic and carcinogenic potential of ozone alone or in combination with 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and/or dibutyl phthalate (DBP)."	( Toxicity and carcinogenicity of ozone in combination with 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone and dibutyl phthalate in B6C3F1 mice for 16 and 32 weeks. Cho, MY; Kim, MY, 2009)	0.82
" Oviductal carcinomas were observed in female mice exposed to ozone or DBP alone for 16 weeks and ozone in combination with NNK and DBP for 32 weeks."	( Toxicity and carcinogenicity of ozone in combination with 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone and dibutyl phthalate in B6C3F1 mice for 16 and 32 weeks. Cho, MY; Kim, MY, 2009)	0.6

Excerpt	Reference	Relevance
" This decrease in lung DNA methylation appears to be due to the decreased bioavailability of NNK and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol in the lungs of I3C-treated mice which, in turn, may be a result of increased metabolic alpha-hydroxylation of NNK by the liver."	( Effects of indole-3-carbinol on lung tumorigenesis and DNA methylation induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and on the metabolism and disposition of NNK in A/J mice. Amin, SG; Chung, FL; LaGreca, SD; Morse, MA, 1990)	0.28
"The main reasons for the failure of most chemopreventive agents during clinical trials are poor in vivo bioavailability and dose-limiting side effects."	( Chemoprevention of lung tumorigenesis by intranasally administered diindolylmethane in A/J mice. Kassie, F; Melkamu, T; Qian, X; Song, JM; Upadhyaya, P, 2013)	0.39

Excerpt	Relevance	Reference
" For both isothiocyanates, there were no statistically significant differences between dosing frequencies in inhibitory effects on tumor multiplicities and tumor incidences."	( Effect of frequency of isothiocyanate administration on inhibition of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced pulmonary adenoma formation in A/J mice. Amin, SG; Chung, FL; Eklind, KI; Morse, MA, 1992)	0.28
" The inhibitory effects of green tea infusion were also observed in a similar experiment using a higher dosage of NDEA (20 mg/kg)."	( Inhibition of N-nitrosodiethylamine- and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone-induced tumorigenesis in A/J mice by green tea and black tea. Conney, AH; Hong, JY; Huang, MT; Reuhl, KR; Wang, ZY; Yang, CS, 1992)	0.28
" The studies described in this paper illustrate the utility of performing dose-response experiments and the quantitation of DNA methylation and repair in not only target tissues but also target cell types."	( Role of DNA methylation in the activation of proto-oncogenes and the induction of pulmonary neoplasia by nitrosamines. Anderson, MW; Belinsky, SA; Devereux, TR, )	0.13
" The effects of I3C on NNK-induced DNA methylation in the lungs and livers of A/J mice were assessed using the same dosing regimen as in the bioassay."	( Effects of indole-3-carbinol on lung tumorigenesis and DNA methylation induced by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and on the metabolism and disposition of NNK in A/J mice. Amin, SG; Chung, FL; LaGreca, SD; Morse, MA, 1990)	0.28
"The relationship between the formation of O6-methylguanine (O6MG) and the induction of lung, liver, and nasal tumors in the Fisher 344 rat by the tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) was examined in a dose-response study."	( Dose-response relationship between O6-methylguanine formation in Clara cells and induction of pulmonary neoplasia in the rat by 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone. Anderson, MW; Belinsky, SA; Foley, JF; Maronpot, RR; White, CM, 1990)	0.28
" In contrast, the dose-response curve for methylation by NDMA appeared opposite of that for NNK with alkylation efficiency increasing as a function of dose."	( Factors regulating activation and DNA alkylation by 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone and nitrosodimethylamine in rat lung and isolated lung cells, and the relationship to carcinogenicity. Anderson, MW; Belinsky, SA; Devereux, TR, 1988)	0.53
" The dose-response to NNK was nonlinear; the ratio of O6-meG to dose, an index of alkylation efficiency, increased dramatically as the dose of carcinogen decreased."	( Molecular dosimetry of O6-methylguanine formation and cell toxicity in lung and nasal mucosa by 4-(N-nitrosomethylamino)-1-(3-pyridyl)-1-butanone. Anderson, MW; Belinsky, SA; Swenberg, JA, 1987)	0.27
" These mice, together with female A/J mice, were treated at 6-8 weeks of age with NNK or dosed with PEITC prior to administration of NNK."	( K-ras mutations in lung tumors from A/J and A/J x TSG-p53 F1 mice treated with 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone and phenethyl isothiocyanate. Anderson, MW; Crist, KA; Kelloff, GJ; Lubet, RA; Matzinger, SA; Pereira, MA; Steele, VE; Stoner, GD; You, M, 1995)	0.29
" When isolated rat livers were perfused with 150 microM NNK, equal to a dosage which is sufficient to induce liver tumors in rat, glucuronidation of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) was increased when compared to the concentration of 35 nM NNK."	( Metabolism of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) in isolated rat lung and liver. Foth, H; Hirsch-Ernst, KI; Richter, E; Schrader, E, 1998)	0.3
" NNK-derived radioactivity was still detectable in urine 10 days after dosing (total excretion, 92."	( Metabolism and disposition of 4-(methylnitrosamino)-1-(3-pyridyl)-1- butanone (NNK) in rhesus monkeys. A-Rahim, YI; Hargaden, MB; Meger, M; Oehlmann, C; Richter, E; Vesell, ES; Zwickenpflug, W, 1999)	0.3
"Dietary myo-inositol is an effective inhibitor of lung tumor induction in mice, but no dose-response studies have been reported."	( Dose-response study of myo-inositol as an inhibitor of lung tumorigenesis induced in A/J mice by benzo. Hecht, SS; Kenney, PM; Upadhyaya, P; Wang, M, 2001)	0.31
" Three experiments were performed: (i) a dose-response study with vinyl carbamate-induced tumors; (ii) a limited treatment study also with vinyl carbamate and (iii) prevention of NNK-induced tumors."	( Prevention of mouse lung tumors by targretin. Alyaqoub, FS; Gunning, WT; Kramer, PM; Liu, Y; Lubet, RA; Nines, R; Pereira, MA; Steele, VE, 2006)	0.33
" When NNK treatments were combined, the dose-response curve became bell-shaped where the MF at the highest radiation dose decreased substantially."	( Combined genotoxic effects of radiation and a tobacco-specific nitrosamine in the lung of gpt delta transgenic mice. Hayata, I; Ikeda, M; Masumura, K; Nenoi, M; Nohmi, T; Sakamoto, Y; Sakuma, K; Wang, B, 2007)	0.34
" We substituted dimethyl sulfate (DMS) to create alkylating damage in pCMVluc plasmid DNA and established the damage-repair dose-response curves in both normal and nucleotide excision repair-deficient lymphoblastoid cell lines and in phytohemagglutinin (PHA)-stimulated primary lymphocytes."	( A modified host-cell reactivation assay to measure repair of alkylating DNA damage for assessing risk of lung adenocarcinoma. Guo, Z; Qiao, Y; Shi, Q; Spitz, MR; Wang, L; Wei, Q, 2007)	0.34
" Microarray analysis revealed that, independent of the dose of NNK, expression of 30 genes was significantly altered; 22 of these genes showed a dose-response pattern."	( Gene expression profiles in HPV-immortalized human cervical cells treated with the nicotine-derived carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone. El-Bayoumy, K; Freeman, WM; Prokopczyk, B; Sinha, I; Trushin, N, 2009)	0.35
" The approach using Bayesian methods better accounts for the uncertainty inherent in the values generated using input assumptions and provides for a more robust probabilistic dose-response assessment."	( Bayesian derivation of an oral cancer slope factor distribution for 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK). Kathman, S; Naufal, Z; Wilson, C, 2009)	0.35
" The discrepancy between cotinine levels in relation to disease risk comparing active versus passive smoking suggests a nonlinear tobacco smoke dose-response and/or that cotinine is not providing an accurate measure of exposure to the toxic constituents of secondhand tobacco smoke."	( Urine cotinine underestimates exposure to the tobacco-derived lung carcinogen 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone in passive compared with active smokers. Benowitz, N; Eisner, MD; Goniewicz, ML; Havel, C; Jacob, P; Koszowski, B; Lazcano-Ponce, E; Sobczak, A; Zielinska-Danch, W, 2010)	0.36
" The association between the NNAL-Gluc/free NNAL ratio and UC risk was significant in a dose-response manner."	( Low ratio of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol-glucuronides (NNAL-Gluc)/free NNAL increases urothelial carcinoma risk. Chung, CJ; Hsueh, YM; Lee, HL; Lin, P; Pu, YS; Shiue, HS; Su, CT; Yang, HY, 2011)	0.37
" Based on dose-response of γH2AX and Hill model, the ability to induce DSBs was evaluated: NNN-acetate > B[a]P > NNK-acetate > tar > nicotine."	( Genotoxicity analysis of five particle matter toxicants from cigarette smoke based on γH2AX assay combined with Hill/Two-component model. Chen, H; Hou, H; Hu, Q; Liu, Y; Wang, A; Zhang, S, 2018)	0.48

Class	Description
nitrosamine	N-Nitroso amines, compounds of the structure R2NNO. Compounds RNHNO are not ordinarily isolable, but they, too, are nitrosamines. The name is a contraction of N-nitrosoamine and, as such, does not require the N locant.
pyridines	Any organonitrogen heterocyclic compound based on a pyridine skeleton and its substituted derivatives.
[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]

Protein	Taxonomy	Measurement	Average (µ)	Min (ref.)	Avg (ref.)	Max (ref.)	Bioassay(s)
estrogen-related nuclear receptor alpha	Homo sapiens (human)	Potency	76.9588	0.0015	30.6073	15,848.9004	AID1224841
[prepared from compound, protein, and bioassay information from National Library of Medicine (NLM), extracted Dec-2023]

Assay ID	Title	Year	Journal	Article
AID1347083	qHTS for Inhibitors of the Functional Ribonucleoprotein Complex (vRNP) of Lassa (LASV) Arenavirus: Viability assay - alamar blue signal for LASV Primary Screen	2020	Antiviral research, 01, Volume: 173	A cell-based, infectious-free, platform to identify inhibitors of lassa virus ribonucleoprotein (vRNP) activity.
AID1347086	qHTS for Inhibitors of the Functional Ribonucleoprotein Complex (vRNP) of Lymphocytic Choriomeningitis Arenaviruses (LCMV): LCMV Primary Screen - GLuc reporter signal	2020	Antiviral research, 01, Volume: 173	A cell-based, infectious-free, platform to identify inhibitors of lassa virus ribonucleoprotein (vRNP) activity.
AID1508630	Primary qHTS for small molecule stabilizers of the endoplasmic reticulum resident proteome: Secreted ER Calcium Modulated Protein (SERCaMP) assay	2021	Cell reports, 04-27, Volume: 35, Issue:4	A target-agnostic screen identifies approved drugs to stabilize the endoplasmic reticulum-resident proteome.
AID1347082	qHTS for Inhibitors of the Functional Ribonucleoprotein Complex (vRNP) of Lassa (LASV) Arenavirus: LASV Primary Screen - GLuc reporter signal	2020	Antiviral research, 01, Volume: 173	A cell-based, infectious-free, platform to identify inhibitors of lassa virus ribonucleoprotein (vRNP) activity.
AID1347154	Primary screen GU AMC qHTS for Zika virus inhibitors	2020	Proceedings of the National Academy of Sciences of the United States of America, 12-08, Volume: 117, Issue:49	Therapeutic candidates for the Zika virus identified by a high-throughput screen for Zika protease inhibitors.
AID1653806	Substrate activity at human mARC2 expressed in Escherichia coli assessed as turnover rates at 3 mM pre-incubated for 3 mins followed by NADH addition and measured after 15 mins by LC-MS analysis based assay	2020	Journal of medicinal chemistry, 06-25, Volume: 63, Issue:12	Drug Metabolism by the Mitochondrial Amidoxime Reducing Component (mARC): Rapid Assay and Identification of New Substrates.
AID1653796	Substrate activity at human mARC2 expressed in Escherichia coli assessed as turnover rates at 3 mM pre-incubated for 3 mins followed by NADH addition and measured after 15 mins by UV-Visible spectroscopy based NADH assay	2020	Journal of medicinal chemistry, 06-25, Volume: 63, Issue:12	Drug Metabolism by the Mitochondrial Amidoxime Reducing Component (mARC): Rapid Assay and Identification of New Substrates.
AID1653791	Substrate activity at human mARC1 expressed in Escherichia coli assessed as turnover rates at 3 mM pre-incubated for 3 mins followed by NADH addition and measured after 15 mins by UV-Visible spectroscopy based NADH assay	2020	Journal of medicinal chemistry, 06-25, Volume: 63, Issue:12	Drug Metabolism by the Mitochondrial Amidoxime Reducing Component (mARC): Rapid Assay and Identification of New Substrates.
AID1653801	Substrate activity at human mARC1 expressed in Escherichia coli assessed as turnover rates at 3 mM pre-incubated for 3 mins followed by NADH addition and measured after 15 mins by LC-MS analysis based assay	2020	Journal of medicinal chemistry, 06-25, Volume: 63, Issue:12	Drug Metabolism by the Mitochondrial Amidoxime Reducing Component (mARC): Rapid Assay and Identification of New Substrates.
[information is prepared from bioassay data collected from National Library of Medicine (NLM), extracted Dec-2023]

Timeframe	Studies, This Drug (%)	All Drugs %
pre-1990	78 (8.16)	18.7374
1990's	282 (29.50)	18.2507
2000's	294 (30.75)	29.6817
2010's	275 (28.77)	24.3611
2020's	27 (2.82)	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	15 (1.50%)	5.53%
Reviews	44 (4.41%)	6.00%
Case Studies	1 (0.10%)	4.05%
Observational	0 (0.00%)	0.25%
Other	938 (93.99%)	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
protocatechuic acid protocatechuic acid: RN given refers to parent cpd; structure. 3,4-dihydroxybenzoic acid : A dihydroxybenzoic acid in which the hydroxy groups are located at positions 3 and 4.	2	1	0	catechols; dihydroxybenzoic acid	antineoplastic agent; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.14.11.2 (procollagen-proline dioxygenase) inhibitor; human xenobiotic metabolite; plant metabolite
gamma-aminobutyric acid gamma-Aminobutyric Acid: The most common inhibitory neurotransmitter in the central nervous system.. gamma-aminobutyric acid : A gamma-amino acid that is butanoic acid with the amino substituent located at C-4.	2.74	3	0	amino acid zwitterion; gamma-amino acid; monocarboxylic acid	human metabolite; neurotransmitter; Saccharomyces cerevisiae metabolite; signalling molecule
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.	2.03	1	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).	2.38	2	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]	2.42	2	0	6-aminopurines; purine nucleobase	Daphnia magna metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
quinacrine Quinacrine: An acridine derivative formerly widely used as an antimalarial but superseded by chloroquine in recent years. It has also been used as an anthelmintic and in the treatment of giardiasis and malignant effusions. It is used in cell biological experiments as an inhibitor of phospholipase A2.. quinacrine : A member of the class of acridines that is acridine substituted by a chloro group at position 6, a methoxy group at position 2 and a [5-(diethylamino)pentan-2-yl]nitrilo group at position 9.	2.05	1	0	acridines; aromatic ether; organochlorine compound; tertiary amino compound	antimalarial; EC 1.8.1.12 (trypanothione-disulfide reductase) inhibitor
benzene [no description available]	7.1	5	2	aromatic annulene; benzenes; volatile organic compound	carcinogenic agent; environmental contaminant; non-polar solvent
butyraldehyde [no description available]	2.06	1	0	butanals	biomarker; Escherichia coli metabolite; mouse metabolite
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.	8.83	14	7	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
coumarin 2H-chromen-2-one: coumarin derivative	2.94	4	0	coumarins	fluorescent dye; human metabolite; plant metabolite
nornicotine nornicotine: agricultural or horticultural insecticide; RN given refers to (+-)-isomer; structure	7.69	3	0
pseudooxynicotine pseudooxynicotine: structure given in first source. pseudooxynicotine : An aminoacylpyridine that is pyridine substituted at position 3 by a 4-(methylamino)butanoyl group.	2.42	2	0	aminoacylpyridine; pyridine alkaloid
bupropion Bupropion: A propiophenone-derived antidepressant and antismoking agent that inhibits the uptake of DOPAMINE.. bupropion : An aromatic ketone that is propiophenone carrying a tert-butylamino group at position 2 and a chloro substituent at position 3 on the phenyl ring.	2.15	1	0	aromatic ketone; monochlorobenzenes; secondary amino compound	antidepressant; environmental contaminant; xenobiotic
4-nitrobenzaldehyde 4-nitrobenzaldehyde: RN given refers to parent cpd. 4-nitrobenzaldehyde : A C-nitro compound that is benzaldehyde substituted at the para-position with a nitro group.	2.1	1	0	benzaldehydes; C-nitro compound
formaldehyde paraform: polymerized formaldehyde; RN given refers to parent cpd; used in root canal therapy	4.34	6	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.	2.15	1	0	alditol; triol	algal metabolite; detergent; Escherichia coli metabolite; geroprotector; human metabolite; mouse metabolite; osmolyte; Saccharomyces cerevisiae metabolite; solvent
hydrogen carbonate Bicarbonates: Inorganic salts that contain the -HCO3 radical. They are an important factor in determining the pH of the blood and the concentration of bicarbonate ions is regulated by the kidney. Levels in the blood are an index of the alkali reserve or buffering capacity.. hydrogencarbonate : The carbon oxoanion resulting from the removal of a proton from carbonic acid.	2.02	1	0	carbon oxoanion	cofactor; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
thioctic acid Thioctic Acid: An octanoic acid bridged with two sulfurs so that it is sometimes also called a pentanoic acid in some naming schemes. It is biosynthesized by cleavage of LINOLEIC ACID and is a coenzyme of oxoglutarate dehydrogenase (KETOGLUTARATE DEHYDROGENASE COMPLEX). It is used in DIETARY SUPPLEMENTS.	2	1	0	dithiolanes; heterocyclic fatty acid; thia fatty acid	fundamental metabolite; geroprotector
inositol Inositol: An isomer of glucose that has traditionally been considered to be a B vitamin although it has an uncertain status as a vitamin and a deficiency syndrome has not been identified in man. (From Martindale, The Extra Pharmacopoeia, 30th ed, p1379) Inositol phospholipids are important in signal transduction.. inositol : Any cyclohexane-1,2,3,4,5,6-hexol.. 1D-chiro-inositol : Belonging to the inositol family of compounds, D-chiro-inositol (DCI) is an isomer of glucose. It is an important secondary messenger in insulin signal transduction.. muco-inositol : An inositol that is cyclohexane-1,2,3,4,5,6-hexol having a (1R,2R,3r,4R,5S,6r)-configuration.	3.84	4	0	cyclitol; hexol
naphthalene [no description available]	2.04	1	0	naphthalenes; ortho-fused bicyclic arene	apoptosis inhibitor; carcinogenic agent; environmental contaminant; mouse metabolite; plant metabolite; volatile oil component
niacin Niacin: A water-soluble vitamin of the B complex occurring in various animal and plant tissues. It is required by the body for the formation of coenzymes NAD and NADP. It has PELLAGRA-curative, vasodilating, and antilipemic properties.. vitamin B3 : Any member of a group of vitamers that belong to the chemical structural class called pyridines that exhibit biological activity against vitamin B3 deficiency. Vitamin B3 deficiency causes a condition known as pellagra whose symptoms include depression, dermatitis and diarrhea. The vitamers include nicotinic acid and nicotinamide (and their ionized and salt forms).. nicotinic acid : A pyridinemonocarboxylic acid that is pyridine in which the hydrogen at position 3 is replaced by a carboxy group.	2.21	1	0	pyridine alkaloid; pyridinemonocarboxylic acid; vitamin B3	antidote; antilipemic drug; EC 3.5.1.19 (nicotinamidase) inhibitor; Escherichia coli metabolite; human urinary metabolite; metabolite; mouse metabolite; plant metabolite; vasodilator agent
nitrates Nitrates: Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- radical.	2.68	3	0	monovalent inorganic anion; nitrogen oxoanion; reactive nitrogen species
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)	2.02	1	0	monovalent inorganic anion; nitrogen oxoanion; reactive nitrogen species	human metabolite
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.	1.99	1	0	4-nitrophenols	human xenobiotic metabolite; mouse metabolite
spermine [no description available]	2.15	1	0	polyazaalkane; tetramine	antioxidant; fundamental metabolite; immunosuppressive agent
thiamine thiamine(1+) : A primary alcohol that is 1,3-thiazol-3-ium substituted by (4-amino-2-methylpyrimidin-5-yl)methyl, methyl and 2-hydroxyethyl groups at positions 3, 4 and 5, respectively.	2.08	1	0	primary alcohol; vitamin B1	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
thymine [no description available]	2.73	3	0	pyrimidine nucleobase; pyrimidone	Escherichia coli metabolite; human metabolite; mouse metabolite
menthol Menthol: A monoterpene cyclohexanol produced from mint oils.	4.52	5	1	p-menthane monoterpenoid; secondary alcohol	volatile oil component
1,2-dimethylhydrazine 1,2-Dimethylhydrazine: A DNA alkylating agent that has been shown to be a potent carcinogen and is widely used to induce colon tumors in experimental animals.. 1,2-dimethylhydrazine : A member of the class of hydrazines that is hydrazine in which one of the hydrogens attached to each nitrogen is replaced by a methyl group. A powerful DNA alkylating agent and carcinogen, it is used to induce colon cancer in laboratory rats and mice.	2.38	2	0	hydrazines	alkylating agent; carcinogenic agent
2-amino-1-methyl-6-phenylimidazo(4,5-b)pyridine 2-amino-1-methyl-6-phenylimidazo(4,5-b)pyridine: mutagen from fried ground beef; structure given in first source. PhIP : An imidazopyridine that is 1H--imidazo[4,5-b]pyridine which is substituted at positions 1, 2, and 6 by methyl, amino, and phenyl groups, respectively. It is the most abundant of the mutagenic heterocyclic amines found in cooked meat and fish.	3.14	5	0	imidazopyridine; primary amino compound	carcinogenic agent; mutagen
3-aminobenzamide [no description available]	1.99	1	0	benzamides; substituted aniline	EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) 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.	2.67	3	0	ortho- and peri-fused polycyclic arene	aryl hydrocarbon receptor agonist; carcinogenic agent
phenytoin [no description available]	3.09	1	0	imidazolidine-2,4-dione	anticonvulsant; drug allergen; sodium channel blocker; teratogenic agent
theophylline [no description available]	2	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
anastrozole [no description available]	2.07	1	0	nitrile; triazoles	antineoplastic agent; EC 1.14.14.14 (aromatase) inhibitor
arecoline Arecoline: An alkaloid obtained from the betel nut (Areca catechu), fruit of a palm tree. It is an agonist at both muscarinic and nicotinic acetylcholine receptors. It is used in the form of various salts as a ganglionic stimulant, a parasympathomimetic, and a vermifuge, especially in veterinary practice. It has been used as a euphoriant in the Pacific Islands.. arecoline : A tetrahydropyridine that is 1,2,5,6-tetrahydropyridine with a methyl group at position 1, and a methoxycarbonyl group at position 3. An alkaloid found in the areca nut, it acts as an agonist of muscarinic acetylcholine.	2.41	2	0	enoate ester; methyl ester; pyridine alkaloid; tetrahydropyridine	metabolite; muscarinic agonist
aspirin Aspirin: The prototypical analgesic used in the treatment of mild to moderate pain. It has anti-inflammatory and antipyretic properties and acts as an inhibitor of cyclooxygenase which results in the inhibition of the biosynthesis of prostaglandins. Aspirin also inhibits platelet aggregation and is used in the prevention of arterial and venous thrombosis. (From Martindale, The Extra Pharmacopoeia, 30th ed, p5). acetylsalicylate : A benzoate that is the conjugate base of acetylsalicylic acid, arising from deprotonation of the carboxy group.. acetylsalicylic acid : A member of the class of benzoic acids that is salicylic acid in which the hydrogen that is attached to the phenolic hydroxy group has been replaced by an acetoxy group. A non-steroidal anti-inflammatory drug with cyclooxygenase inhibitor activity.	3.6	9	0	benzoic acids; phenyl acetates; salicylates	anticoagulant; antipyretic; cyclooxygenase 1 inhibitor; cyclooxygenase 2 inhibitor; drug allergen; EC 1.1.1.188 (prostaglandin-F synthase) inhibitor; geroprotector; non-narcotic analgesic; non-steroidal anti-inflammatory drug; plant activator; platelet aggregation inhibitor; prostaglandin antagonist; teratogenic 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.	2.02	1	0	ethanolamines; monocarboxylic acid amide; propanolamine	anti-arrhythmia drug; antihypertensive agent; beta-adrenergic antagonist; environmental contaminant; sympatholytic agent; xenobiotic
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.	9.39	60	0	ortho- and peri-fused polycyclic arene	carcinogenic agent; mouse metabolite
benzyl isothiocyanate benzyl isothiocyanate: inhibits carcinogen-induced neoplasia; structure in Negwer, 5th ed, #715; also promotes urinary bladder carcinoma	4.48	7	0	benzenes; isothiocyanate	antibacterial drug
beta-naphthoflavone beta-Naphthoflavone: A polyaromatic hydrocarbon inducer of P4501A1 and P4501A2 cytochromes. (Proc Soc Exp Biol Med 1994 Dec:207(3):302-308). beta-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the f side of flavone.	2.39	2	0	extended flavonoid; naphtho-gamma-pyrone; organic heterotricyclic compound	aryl hydrocarbon receptor agonist
caffeine [no description available]	2.91	4	0	purine alkaloid; trimethylxanthine	adenosine A2A receptor antagonist; adenosine receptor antagonist; adjuvant; central nervous system stimulant; diuretic; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; environmental contaminant; food additive; fungal metabolite; geroprotector; human blood serum metabolite; mouse metabolite; mutagen; plant metabolite; psychotropic drug; ryanodine receptor agonist; xenobiotic
camphor, (+-)-isomer [no description available]	1.97	1	0	bornane monoterpenoid; cyclic monoterpene ketone	plant metabolite
celecoxib [no description available]	2.03	1	0	organofluorine compound; pyrazoles; sulfonamide; toluenes	cyclooxygenase 2 inhibitor; geroprotector; non-narcotic analgesic; non-steroidal anti-inflammatory drug
cimetidine Cimetidine: A histamine congener, it competitively inhibits HISTAMINE binding to HISTAMINE H2 RECEPTORS. Cimetidine has a range of pharmacological actions. It inhibits GASTRIC ACID secretion, as well as PEPSIN and GASTRIN output.. cimetidine : A member of the class of guanidines that consists of guanidine carrying a methyl substituent at position 1, a cyano group at position 2 and a 2-{[(5-methyl-1H-imidazol-4-yl)methyl]sulfanyl}ethyl group at position 3. It is a H2-receptor antagonist that inhibits the production of acid in stomach.	2	1	0	aliphatic sulfide; guanidines; imidazoles; nitrile	adjuvant; analgesic; anti-ulcer drug; H2-receptor antagonist; P450 inhibitor
clonidine Clonidine: An imidazoline sympatholytic agent that stimulates ALPHA-2 ADRENERGIC RECEPTORS and central IMIDAZOLINE RECEPTORS. It is commonly used in the management of HYPERTENSION.. clonidine (amino form) : A clonidine that is 4,5-dihydro-1H-imidazol-2-amine in which one of the amino hydrogens is replaced by a 2,6-dichlorophenyl group.	2	1	0	clonidine; imidazoline
debrisoquin Debrisoquin: An adrenergic neuron-blocking drug similar in effects to GUANETHIDINE. It is also noteworthy in being a substrate for a polymorphic cytochrome P-450 enzyme. Persons with certain isoforms of this enzyme are unable to properly metabolize this and many other clinically important drugs. They are commonly referred to as having a debrisoquin 4-hydroxylase polymorphism.	2.38	2	0	carboxamidine; isoquinolines	adrenergic agent; antihypertensive agent; human metabolite; sympatholytic agent
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.	3.12	5	0	diester; phthalate ester	EC 3.2.1.20 (alpha-glucosidase) inhibitor; environmental contaminant; metabolite; plasticiser; teratogenic agent
dichlobanil 2,6-dichlorobenzonitrile : A nitrile that is benzonitrile which is substituted by chlorines at positions 2 and 6. A cellulose synthesis inhibitor, it is used as a pre-emergent and early post-emergent herbicide.	1.99	1	0	dichlorobenzene; nitrile	agrochemical; cellulose synthesis inhibitor; environmental contaminant; herbicide; xenobiotic
3,3'-diindolylmethane 3,3'-diindolylmethane: anti-inflammatory from edible cruciferous vegetables; a cytochrome P-450 antagonist	4.52	2	0	indoles	antineoplastic agent; P450 inhibitor
dipyridamole Dipyridamole: A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752). dipyridamole : A pyrimidopyrimidine that is 2,2',2'',2'''-(pyrimido[5,4-d]pyrimidine-2,6-diyldinitrilo)tetraethanol substituted by piperidin-1-yl groups at positions 4 and 8 respectively. A vasodilator agent, it inhibits the formation of blood clots.	2.1	1	0	piperidines; pyrimidopyrimidine; tertiary amino compound; tetrol	adenosine phosphodiesterase inhibitor; EC 3.5.4.4 (adenosine deaminase) inhibitor; platelet aggregation inhibitor; vasodilator agent
disulfiram [no description available]	2.05	1	0	organic disulfide; organosulfur acaricide	angiogenesis inhibitor; antineoplastic agent; apoptosis inducer; EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor; EC 3.1.1.1 (carboxylesterase) inhibitor; EC 3.1.1.8 (cholinesterase) inhibitor; EC 5.99.1.2 (DNA topoisomerase) inhibitor; ferroptosis inducer; fungicide; NF-kappaB inhibitor
flufenamic acid Flufenamic Acid: An anthranilic acid derivative with analgesic, anti-inflammatory, and antipyretic properties. It is used in musculoskeletal and joint disorders and administered by mouth and topically. (From Martindale, The Extra Pharmacopoeia, 30th ed, p16). flufenamic acid : An aromatic amino acid consisting of anthranilic acid carrying an N-(trifluoromethyl)phenyl substituent. An analgesic and anti-inflammatory, it is used in rheumatic disorders.	2	1	0	aromatic amino acid; organofluorine compound	antipyretic; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; non-narcotic analgesic; non-steroidal anti-inflammatory drug
hexamethonium Hexamethonium: A nicotinic cholinergic antagonist often referred to as the prototypical ganglionic blocker. It is poorly absorbed from the gastrointestinal tract and does not cross the blood-brain barrier. It has been used for a variety of therapeutic purposes including hypertension but, like the other ganglionic blockers, it has been replaced by more specific drugs for most purposes, although it is widely used a research tool.	1.97	1	0	quaternary ammonium salt
hydroxyurea [no description available]	2.45	2	0	one-carbon compound; ureas	antimetabolite; antimitotic; antineoplastic agent; DNA synthesis inhibitor; EC 1.17.4.1 (ribonucleoside-diphosphate reductase) inhibitor; genotoxin; immunomodulator; radical scavenger; teratogenic agent
ibuprofen Midol: combination of cinnamedrine, phenacetin, aspirin & caffeine	2.4	2	0	monocarboxylic acid	antipyretic; cyclooxygenase 1 inhibitor; cyclooxygenase 2 inhibitor; drug allergen; environmental contaminant; geroprotector; non-narcotic analgesic; non-steroidal anti-inflammatory drug; radical scavenger; 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	1	0	dibenzoazepine	adrenergic uptake inhibitor; antidepressant; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor
indole-3-carbinol indole-3-carbinol: occurs in edible cruciferous vegetables. indole-3-methanol : An indolyl alcohol carrying a hydroxymethyl group at position 3. It is a constituent of the cruciferous vegetables and had anticancer activity.	6.42	12	0	indolyl alcohol	antineoplastic agent; plant metabolite
indomethacin Indomethacin: A non-steroidal anti-inflammatory agent (NSAID) that inhibits CYCLOOXYGENASE, which is necessary for the formation of PROSTAGLANDINS and other AUTACOIDS. It also inhibits the motility of POLYMORPHONUCLEAR LEUKOCYTES.. indometacin : A member of the class of indole-3-acetic acids that is indole-3-acetic acid in which the indole ring is substituted at positions 1, 2 and 5 by p-chlorobenzoyl, methyl, and methoxy groups, respectively. A non-steroidal anti-inflammatory drug, it is used in the treatment of musculoskeletal and joint disorders including osteoarthritis, rheumatoid arthritis, gout, bursitis and tendinitis.	2.01	1	0	aromatic ether; indole-3-acetic acids; monochlorobenzenes; N-acylindole	analgesic; drug metabolite; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; environmental contaminant; gout suppressant; non-steroidal anti-inflammatory drug; xenobiotic metabolite; xenobiotic
isoniazid Hydra: A genus of freshwater polyps in the family Hydridae, order Hydroida, class HYDROZOA. They are of special interest because of their complex organization and because their adult organization corresponds roughly to the gastrula of higher animals.. hydrazide : Compounds derived from oxoacids RkE(=O)l(OH)m (l =/= 0) by replacing -OH by -NRNR2 (R groups are commonly H). (IUPAC).	2.05	1	0	carbohydrazide	antitubercular agent; drug allergen
isoproterenol Isoproterenol: Isopropyl analog of EPINEPHRINE; beta-sympathomimetic that acts on the heart, bronchi, skeletal muscle, alimentary tract, etc. It is used mainly as bronchodilator and heart stimulant.. isoprenaline : A secondary amino compound that is noradrenaline in which one of the hydrogens attached to the nitrogen is replaced by an isopropyl group. A sympathomimetic acting almost exclusively on beta-adrenergic receptors, it is used (mainly as the hydrochloride salt) as a bronghodilator and heart stimulant for the management of a variety of cardiac disorders.	2.43	2	0	catechols; secondary alcohol; secondary amino compound	beta-adrenergic agonist; bronchodilator agent; cardiotonic drug; sympathomimetic agent
mimosine Mimosine: 3-Hydroxy-4-oxo-1(4H)-pyridinealanine. An antineoplastic alanine-substituted pyridine derivative isolated from Leucena glauca.	2.11	1	0	alpha-amino acid
leflunomide Leflunomide: An isoxazole derivative that inhibits dihydroorotate dehydrogenase, the fourth enzyme in the pyrimidine biosynthetic pathway. It is used an immunosuppressive agent in the treatment of RHEUMATOID ARTHRITIS and PSORIATIC ARTHRITIS.. leflunomide : A monocarboxylic acid amide obtained by formal condensation of the carboxy group of 5-methyl-1,2-oxazole-4-carboxylic acid with the anilino group of 4-(trifluoromethyl)aniline. The prodrug of teriflunomide.	2.25	1	0	(trifluoromethyl)benzenes; isoxazoles; monocarboxylic acid amide	antineoplastic agent; antiparasitic agent; EC 1.3.98.1 [dihydroorotate oxidase (fumarate)] inhibitor; EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor; hepatotoxic agent; immunosuppressive agent; non-steroidal anti-inflammatory drug; prodrug; pyrimidine synthesis inhibitor; tyrosine kinase inhibitor
2-(4-morpholinyl)-8-phenyl-4h-1-benzopyran-4-one 2-(4-morpholinyl)-8-phenyl-4H-1-benzopyran-4-one: specific inhibitor of phosphatidylinositol 3-kinase; structure in first source	2.31	1	0	chromones; morpholines; organochlorine compound	autophagy inhibitor; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; geroprotector
mecamylamine Mecamylamine: A nicotinic antagonist that is well absorbed from the gastrointestinal tract and crosses the blood-brain barrier. Mecamylamine has been used as a ganglionic blocker in treating hypertension, but, like most ganglionic blockers, is more often used now as a research tool.	2.47	2	0	primary aliphatic amine
metformin Metformin: A biguanide hypoglycemic agent used in the treatment of non-insulin-dependent diabetes mellitus not responding to dietary modification. Metformin improves glycemic control by improving insulin sensitivity and decreasing intestinal absorption of glucose. (From Martindale, The Extra Pharmacopoeia, 30th ed, p289). metformin : A member of the class of guanidines that is biguanide the carrying two methyl substituents at position 1.	3.89	3	0	guanidines	environmental contaminant; geroprotector; hypoglycemic agent; xenobiotic
methoxsalen Methoxsalen: A naturally occurring furocoumarin compound found in several species of plants, including Psoralea corylifolia. It is a photoactive substance that forms DNA ADDUCTS in the presence of ultraviolet A irradiation.. methoxsalen : A member of the class of psoralens that is 7H-furo[3,2-g]chromen-7-one in which the 9 position is substituted by a methoxy group. It is a constituent of the fruits of Ammi majus. Like other psoralens, trioxsalen causes photosensitization of the skin. It is administered topically or orally in conjunction with UV-A for phototherapy treatment of vitiligo and severe psoriasis.	4.8	7	1	aromatic ether; psoralens	antineoplastic agent; cross-linking reagent; dermatologic drug; photosensitizing agent; plant metabolite
methyl methanesulfonate [no description available]	2	1	0	methanesulfonate ester	alkylating agent; apoptosis inducer; carcinogenic agent; genotoxin; mutagen
metyrapone Metyrapone: An inhibitor of the enzyme STEROID 11-BETA-MONOOXYGENASE. It is used as a test of the feedback hypothalamic-pituitary mechanism in the diagnosis of CUSHING SYNDROME.. metyrapone : An aromatic ketone that is 3,3-dimethylbutan-2-one in which the methyl groups at positions 1 and 4 are replaced by pyridin-3-yl groups. A steroid 11beta-monooxygenase (EC 1.14.15.4) inhibitor, it is used in the diagnosis of adrenal insufficiency.	2.68	3	0	aromatic ketone	antimetabolite; diagnostic agent; EC 1.14.15.4 (steroid 11beta-monooxygenase) inhibitor
n-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamide N-(2-cyclohexyloxy-4-nitrophenyl)methanesulfonamide: structure given in first source. NS-398 : A C-nitro compound that is N-methylsulfonyl-4-nitroaniline bearing an additional cyclohexyloxy substituent at position 2.	2.69	3	0	aromatic ether; C-nitro compound; sulfonamide	antineoplastic agent; cyclooxygenase 2 inhibitor
o(6)-benzylguanine O(6)-benzylguanine: a suicide inhibitor of O(6)-methylguanine-DNA methyltransferase activity	2.44	2	0
pd 98059 2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one: inhibits MAP kinase kinase (MEK) activity, p42 MAPK and p44 MAPK; structure in first source. 2-(2-amino-3-methoxyphenyl)chromen-4-one : A member of the class of monomethoxyflavones that is 3'-methoxyflavone bearing an additional amino substituent at position 2'.	2.72	3	0	aromatic amine; monomethoxyflavone	EC 2.7.11.24 (mitogen-activated protein kinase) inhibitor; geroprotector
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.	3.38	7	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.	2	1	0	phenols
pioglitazone Pioglitazone: A thiazolidinedione and PPAR GAMMA agonist that is used in the treatment of TYPE 2 DIABETES MELLITUS.. pioglitazone : A member of the class of thiazolidenediones that is 1,3-thiazolidine-2,4-dione substituted by a benzyl group at position 5 which in turn is substituted by a 2-(5-ethylpyridin-2-yl)ethoxy group at position 4 of the phenyl ring. It exhibits hypoglycemic activity.	2.47	2	0	aromatic ether; pyridines; thiazolidinediones	antidepressant; cardioprotective agent; EC 2.7.1.33 (pantothenate kinase) inhibitor; EC 6.2.1.3 (long-chain-fatty-acid--CoA ligase) inhibitor; ferroptosis inhibitor; geroprotector; hypoglycemic agent; insulin-sensitizing drug; PPARgamma agonist; xenobiotic
proadifen Proadifen: An inhibitor of drug metabolism and CYTOCHROME P-450 ENZYME SYSTEM activity.	2.39	2	0	diarylmethane
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.	3.14	5	0	naphthalenes; propanolamine; secondary amine	anti-arrhythmia drug; antihypertensive agent; anxiolytic drug; beta-adrenergic antagonist; environmental contaminant; human blood serum metabolite; vasodilator agent; xenobiotic
safrole Safrole: A member of the BENZODIOXOLES that is a constituent of several VOLATILE OILS, notably SASSAFRAS oil. It is a precursor in the synthesis of the insecticide PIPERONYL BUTOXIDE and the drug N-methyl-3,4-methylenedioxyamphetamine (MDMA).. safrole : A member of the class of benzodioxoles that is 1,3-benzodioxole which is substituted by an allyl group at position 5. It is found in several plants, including black pepper, cinnamon and nutmeg, and is present in several essential oils, notably that of sassafras. It has insecticidal properties and has been used as a topical antiseptic. Although not thought to pose a significant carcinogenic risk to humans, findings of weak carcinogenicity in rats have resulted in the banning of its (previously widespread) use in perfumes and soaps, and as a food additive.	2.21	1	0	benzodioxoles	flavouring agent; insecticide; metabolite; plant metabolite
vorinostat Vorinostat: A hydroxamic acid and anilide derivative that acts as a HISTONE DEACETYLASE inhibitor. It is used in the treatment of CUTANEOUS T-CELL LYMPHOMA and SEZARY SYNDROME.. vorinostat : A dicarboxylic acid diamide comprising suberic (octanedioic) acid coupled to aniline and hydroxylamine. A histone deacetylase inhibitor, it is marketed under the name Zolinza for the treatment of cutaneous T cell lymphoma (CTCL).	2.07	1	0	dicarboxylic acid diamide; hydroxamic acid	antineoplastic agent; apoptosis inducer; EC 3.5.1.98 (histone deacetylase) inhibitor
sulforaphane sulforaphane: from Cardaria draba L.. sulforaphane : An isothiocyanate having a 4-(methylsulfinyl)butyl group attached to the nitrogen.	2.02	1	0	isothiocyanate; sulfoxide	antineoplastic agent; antioxidant; EC 3.5.1.98 (histone deacetylase) inhibitor; plant metabolite
thalidomide Thalidomide: A piperidinyl isoindole originally introduced as a non-barbiturate hypnotic, but withdrawn from the market due to teratogenic effects. It has been reintroduced and used for a number of immunological and inflammatory disorders. Thalidomide displays immunosuppressive and anti-angiogenic activity. It inhibits release of TUMOR NECROSIS FACTOR-ALPHA from monocytes, and modulates other cytokine action.. thalidomide : A racemate comprising equimolar amounts of R- and S-thalidomide.. 2-(2,6-dioxopiperidin-3-yl)-1H-isoindole-1,3(2H)-dione : A dicarboximide that is isoindole-1,3(2H)-dione in which the hydrogen attached to the nitrogen is substituted by a 2,6-dioxopiperidin-3-yl group.	3.09	1	0	phthalimides; piperidones
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	1	0	N-sulfonylurea	human metabolite; hypoglycemic agent; insulin secretagogue; potassium channel blocker
troglitazone Troglitazone: A chroman and thiazolidinedione derivative that acts as a PEROXISOME PROLIFERATOR-ACTIVATED RECEPTORS (PPAR) agonist. It was formerly used in the treatment of TYPE 2 DIABETES MELLITUS, but has been withdrawn due to hepatotoxicity.	2.05	1	0	chromanes; thiazolidinone	anticoagulant; anticonvulsant; antineoplastic agent; antioxidant; EC 6.2.1.3 (long-chain-fatty-acid--CoA ligase) inhibitor; ferroptosis inhibitor; hypoglycemic agent; platelet aggregation inhibitor; vasodilator agent
urethane [no description available]	3.42	7	0	carbamate ester	fungal metabolite; mutagen
1,4-phenylenebis(methylene)selenocyanate 1,4-phenylenebis(methylene)selenocyanate: structure given in first source; inhibits DMBA-induced carcinogenesis by inhibiting DMBA-DNA adduct formation	3.39	7	0
zonisamide Zonisamide: A benzisoxazole and sulfonamide derivative that acts as a CALCIUM CHANNEL blocker. It is used primarily as an adjunctive antiepileptic agent for the treatment of PARTIAL SEIZURES, with or without secondary generalization.. zonisamide : A 1,2-benzoxazole compound having a sulfamoylmethyl substituent at the 3-position.	2.25	1	0	1,2-benzoxazoles; sulfonamide	anticonvulsant; antioxidant; central nervous system drug; protective agent; T-type calcium channel blocker
corticosterone [no description available]	1.99	1	0	11beta-hydroxy steroid; 20-oxo steroid; 21-hydroxy steroid; 3-oxo-Delta(4) steroid; C21-steroid; glucocorticoid; primary alpha-hydroxy ketone	human metabolite; mouse metabolite
thymidine [no description available]	4.32	4	0	pyrimidine 2'-deoxyribonucleoside	Escherichia coli metabolite; human metabolite; metabolite; mouse metabolite
diethylnitrosamine Diethylnitrosamine: A nitrosamine derivative with alkylating, carcinogenic, and mutagenic properties.. N-nitrosodiethylamine : A nitrosamine that is N-ethylethanamine substituted by a nitroso group at the N-atom.	5.09	14	0	nitrosamine	carcinogenic agent; hepatotoxic agent; mutagen
glutamine Glutamine: A non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes. It is synthesized from GLUTAMIC ACID and AMMONIA. It is the principal carrier of NITROGEN in the body and is an important energy source for many cells.. L-glutamine : An optically active form of glutamine having L-configuration.. glutamine : An alpha-amino acid that consists of butyric acid bearing an amino substituent at position 2 and a carbamoyl substituent at position 4.	2	1	0	amino acid zwitterion; glutamine family amino acid; glutamine; L-alpha-amino acid; polar amino acid zwitterion; proteinogenic amino acid	EC 1.14.13.39 (nitric oxide synthase) inhibitor; Escherichia coli metabolite; human metabolite; metabolite; micronutrient; mouse metabolite; nutraceutical; Saccharomyces cerevisiae metabolite
bromodeoxyuridine Bromodeoxyuridine: A nucleoside that substitutes for thymidine in DNA and thus acts as an antimetabolite. It causes breaks in chromosomes and has been proposed as an antiviral and antineoplastic agent. It has been given orphan drug status for use in the treatment of primary brain tumors.	2.39	2	0	pyrimidine 2'-deoxyribonucleoside	antimetabolite; antineoplastic agent
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.	2.74	3	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
dimethylnitrosamine Dimethylnitrosamine: A nitrosamine derivative with alkylating, carcinogenic, and mutagenic properties. It causes serious liver damage and is a hepatocarcinogen in rodents.	4.43	22	0	nitrosamine	geroprotector; mutagen
lactose Lactose: A disaccharide of GLUCOSE and GALACTOSE in human and cow milk. It is used in pharmacy for tablets, in medicine as a nutrient, and in industry.. lactose : A glycosylglucose disaccharide, found most notably in milk, that consists of D-galactose and D-glucose fragments bonded through a beta-1->4 glycosidic linkage. The glucose fragment can be in either the alpha- or beta-pyranose form, whereas the galactose fragment can only have the beta-pyranose form.. beta-lactose : The beta-anomer of lactose.	1.98	1	0	lactose
methionine Methionine: A sulfur-containing essential L-amino acid that is important in many body functions.. methionine : A sulfur-containing amino acid that is butyric acid bearing an amino substituent at position 2 and a methylthio substituent at position 4.	2	1	0	aspartate family amino acid; L-alpha-amino acid; methionine zwitterion; methionine; proteinogenic amino acid	antidote to paracetamol poisoning; human metabolite; micronutrient; mouse metabolite; nutraceutical
medroxyprogesterone acetate [no description available]	2	1	0	20-oxo steroid; 3-oxo-Delta(4) steroid; acetate ester; corticosteroid; steroid ester	adjuvant; androgen; antineoplastic agent; antioxidant; female contraceptive drug; inhibitor; progestin; synthetic oral contraceptive
ethylene Plastipore: high density polyethylene sponge biocompatible material; used as posts in dental bridges	2.03	1	0	alkene; gas molecular entity	plant hormone; refrigerant
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.	2.02	1	0	chloromethanes; volatile organic compound	carcinogenic agent; polar aprotic solvent; refrigerant
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.	3.09	1	0	chloroethenes	carcinogenic agent; mouse metabolite; mutagen
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.	2.83	3	0	benzenes; piperidines	anaesthetic; neurotoxin; NMDA receptor antagonist; psychotropic drug
dimethyl sulfate dimethyl sulfate: RN given refers to unlabeled cpd; structure. dimethyl sulfate : The dimethyl ester of sulfuric acid.	2.03	1	0	alkyl sulfate	alkylating agent; immunosuppressive agent
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.	2.03	1	0	alkadiene; hemiterpene; volatile organic compound	plant 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.	2.81	3	0	butanone; dialkyl ketone; methyl ketone; volatile organic compound	bacterial metabolite; polar aprotic solvent
skatole [no description available]	3.52	2	0	methylindole	human metabolite; mammalian metabolite
rotenone Derris: A plant genus of the family FABACEAE. The root is a source of rotenoids (ROTENONE) and flavonoids. Some species of Pongamia have been reclassified to this genus and some to MILLETTIA. Some species of Deguelia have been reclassified to this genus.. rotenoid : Members of the class of tetrahydrochromenochromene that consists of a cis-fused tetrahydrochromeno[3,4-b]chromene skeleton and its substituted derivatives. The term was originally restricted to natural products, but is now also used to describe semi-synthetic and fully synthetic compounds.	2.43	2	0	organic heteropentacyclic compound; rotenones	antineoplastic agent; metabolite; mitochondrial NADH:ubiquinone reductase inhibitor; phytogenic insecticide; piscicide; toxin
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
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.	3.64	3	0	aminobiphenyl	carcinogenic agent
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.	2.98	1	0	aminotoluene	carcinogenic agent
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	1	0	butan-4-olide	metabolite; neurotoxin
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.	1.98	1	0	styrenes; vinylarene; volatile organic compound	mouse metabolite; mutagen; plant metabolite
4-vinylpyridine 4-vinylpyridine: reagent for blocking cysteine function in proteins; RN given refers to parent cpd	1.98	1	0
2-vinylpyridine [no description available]	1.98	1	0
phenylisothiocyanate phenylisothiocyanate: structure. phenyl isothiocyanate : An isothiocyanate having a phenyl group attached to the nitrogen; used for amino acid sequencing in the Edman degradation.	2.38	2	0	isothiocyanate	allergen; reagent
1,3-butadiene buta-1,3-diene : A butadiene with unsaturation at positions 1 and 3.	6.15	6	2	butadiene	carcinogenic agent; mutagen
acrolein [no description available]	6.66	7	3	enal	herbicide; human xenobiotic metabolite; toxin
bromobenzene [no description available]	1.98	1	0	bromoarene; bromobenzenes; volatile organic compound	hepatotoxic agent; mouse metabolite; non-polar solvent
cyclohexanol Cyclohexanols: Monohydroxy derivatives of cyclohexanes that contain the general formula R-C6H11O. They have a camphorlike odor and are used in making soaps, insecticides, germicides, dry cleaning, and plasticizers.. cyclohexanols : An alcohol in which one or more hydroxy groups are attached to a cyclohexane skeleton.	1.98	1	0	cyclohexanols; secondary alcohol	solvent
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.	2.42	2	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.	2.07	1	0	pyrrole; secondary amine
thiophenes Thiophenes: A monocyclic heteroarene furan in which the oxygen atom is replaced by a sulfur.. thiophenes : Compounds containing at least one thiophene ring.	1.98	1	0	mancude organic heteromonocyclic parent; monocyclic heteroarene; thiophenes; volatile organic compound	non-polar solvent
4-nitrosodimethylaniline 4-nitrosodimethylaniline: structure; RN given refers to parent cpd. N,N-dimethyl-4-nitrosoaniline : A member of the class of dimethylanilines that is N,N-dimethylaniline having a nitroso group at the 4-position.	2.68	3	0	dimethylaniline; nitroso compound; tertiary amino compound
catechin Catechin: An antioxidant flavonoid, occurring especially in woody plants as both (+)-catechin and (-)-epicatechin (cis) forms.. catechin : Members of the class of hydroxyflavan that have a flavan-3-ol skeleton and its substituted derivatives.. rac-catechin : A racemate comprising equimolar amounts of (+)- and (-)-catechin. (+)-catechin : The (+)-enantiomer of catechin and a polyphenolic antioxidant plant metabolite.	5.12	14	0	catechin	antioxidant; plant metabolite
thiamine pyrophosphate Thiamine Pyrophosphate: The coenzyme form of Vitamin B1 present in many animal tissues. It is a required intermediate in the PYRUVATE DEHYDROGENASE COMPLEX and the KETOGLUTARATE DEHYDROGENASE COMPLEX.. thiamine(1+) diphosphate chloride : An organic chloride salt of thiamine(1+) diphosphate.	2.13	1	0	organic chloride salt; vitamin B1
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.	2.47	2	0	azaarene; mancude organic heterobicyclic parent; ortho-fused heteroarene; quinazolines
pyrazines Pyrazines: A heterocyclic aromatic organic compound with the chemical formula C4H4N2.. pyrazine : A diazine that is benzene in which the carbon atoms at positions 1 and 4 have been replaced by nitrogen atoms.	1.98	1	0	diazine; pyrazines	Daphnia magna metabolite
hydrazine diamine : Any polyamine that contains two amino groups.	2.06	1	0	azane; hydrazines	EC 4.3.1.10 (serine-sulfate ammonia-lyase) inhibitor
thiocyanate thiocyanate: RN given refers to parent cpd. thiocyanate : A pseudohalide anion obtained by deprotonation of the thiol group of thiocyanic acid.	2.02	1	0	pseudohalide anion; sulfur molecular entity	human metabolite
azacitidine Azacitidine: A pyrimidine analogue that inhibits DNA methyltransferase, impairing DNA methylation. It is also an antimetabolite of cytidine, incorporated primarily into RNA. Azacytidine has been used as an antineoplastic agent.. 5-azacytidine : An N-glycosyl-1,3,5-triazine that is 4-amino-1,3,5-triazin-2(1H)-one substituted by a beta-D-ribofuranosyl residue via an N-glycosidic linkage. An antineoplastic agent, it is used in the treatment of myeloid leukaemia.	2.44	2	0	N-glycosyl-1,3,5-triazine; nucleoside analogue	antineoplastic agent
pipradrol pipradrol: was heading 1963-94; PIPRADOL was see PIPRADROL 1978-94; use PIPERIDINES to search PIPRADROL 1966-94	2.92	1	0	diarylmethane
thiazolidines Thiazolidines: Reduced (protonated) form of THIAZOLES. They can be oxidized to THIAZOLIDINEDIONES.	3.57	2	0	thiazolidine
hesperidin Hesperidin: A flavanone glycoside found in CITRUS fruit peels.. hesperidin : A disaccharide derivative that consists of hesperetin substituted by a 6-O-(alpha-L-rhamnopyranosyl)-beta-D-glucopyranosyl moiety at position 7 via a glycosidic linkage.	2	1	0	3'-hydroxyflavanones; 4'-methoxyflavanones; dihydroxyflavanone; disaccharide derivative; flavanone glycoside; monomethoxyflavanone; rutinoside	mutagen
perillyl alcohol perillyl alcohol: inhibits geranylgeranyl transferase; structure in first source. perillyl alcohol : A limonene monoterpenoid consists of a cyclohexene ring substituted by a hydroxymethyl and a prop-1-en-2-yl group at positions 1 and 4 respectively. It is a constituent of a variety of essential oils including lavender.	1.99	1	0	limonene monoterpenoid	plant metabolite; volatile oil component
malondialdehyde Malondialdehyde: The dialdehyde of malonic acid.. malonaldehyde : A dialdehyde that is propane substituted by two oxo groups at the terminal carbon atoms respectively. A biomarker of oxidative damage to lipids caused by smoking, it exists in vivo mainly in the enol form.	1.98	1	0	dialdehyde	biomarker
lucanthone hydrochloride Schistosomicides: Agents that act systemically to kill adult schistosomes.	1.98	1	0
anatabine anatabine: alkaloid found in tobacco; structure	3.85	2	1	bipyridines
allyl sulfide allyl sulfide: essence of garlic; inhibits CYP2E1	4.02	4	0	organic sulfide
alpha-naphthoflavone alpha-naphthoflavone: inhibits P4501A1 and P4501A2; stimulates some activities of P4503A4. alpha-naphthoflavone : An extended flavonoid resulting from the formal fusion of a benzene ring with the h side of flavone. A synthetic compound, it is an inhibitor of aromatase (EC 1.14.14.14).	2.38	2	0	extended flavonoid; naphtho-gamma-pyrone; organic heterotricyclic compound	aryl hydrocarbon receptor agonist; aryl hydrocarbon receptor antagonist; EC 1.14.14.14 (aromatase) inhibitor
2-nitrofluorene 2-nitrofluorene: RN given refers to cpd with locant with nitro moiety in 2 position. 2-nitrofluorene : A nitroarene that is fluorene substituted by a nitro group at position 2.	2.07	1	0	nitroarene	carcinogenic agent; mutagen
2-anthramine 2-anthramine: structure	1.99	1	0	anthracenamine
n-methyl-n-nitrosoaniline N-methyl-N-nitrosoaniline: structure	2	1	0
acetylcysteine N-acetyl-L-cysteine : An N-acetyl-L-amino acid that is the N-acetylated derivative of the natural amino acid L-cysteine.	2.95	4	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
methylnitrosourea Methylnitrosourea: A nitrosourea compound with alkylating, carcinogenic, and mutagenic properties.. N-methyl-N-nitrosourea : A member of the class of N-nitrosoureas that is urea in which one of the nitrogens is substituted by methyl and nitroso groups.	2.9	4	0	N-nitrosoureas	alkylating agent; carcinogenic agent; mutagen; teratogenic agent
pyridine n-oxide pyridine N-oxide: RN given refers to parent cpd. pyridine N-oxide : The pyridine N-oxide derived from the parent pyridine. It is a drug metabolite of the antihypertensive agent pinacidil.	1.99	1	0	pyridine N-oxides	drug metabolite
n-nitrosopyrrolidine N-Nitrosopyrrolidine: Carcinogenic nitrosamine that may be formed from preservatives in meats during their preparation or in the liver during metabolism.	2.39	2	0	pyrrolidines
nitrosobenzylmethylamine nitrosobenzylmethylamine: structure	1.99	1	0
3-vinylpyridine 3-vinylpyridine: structure given in first source; formed from nicotine during smoking of tobacco products	1.98	1	0
n'-nitrosoanabasine N'-nitrosoanabasine: structure; RN given refers to cpd without isomeric designation	3.51	8	0	citraconoyl group
glycyrrhizic acid glycyrrhizinic acid : A triterpenoid saponin that is the glucosiduronide derivative of 3beta-hydroxy-11-oxoolean-12-en-30-oic acid.	2	1	0	enone; glucosiduronic acid; pentacyclic triterpenoid; tricarboxylic acid; triterpenoid saponin	EC 3.4.21.5 (thrombin) inhibitor; plant metabolite
d-alpha tocopherol Vitamin E: A generic descriptor for all TOCOPHEROLS and TOCOTRIENOLS that exhibit ALPHA-TOCOPHEROL activity. By virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus, these compounds exhibit varying degree of antioxidant activity, depending on the site and number of methyl groups and the type of ISOPRENOIDS.. tocopherol : A collective name for a group of closely related lipids that contain a chroman-6-ol nucleus substituted at position 2 by a methyl group and by a saturated hydrocarbon chain consisting of three isoprenoid units. They are designated as alpha-, beta-, gamma-, and delta-tocopherol depending on the number and position of additional methyl substituents on the aromatic ring. Tocopherols occur in vegetable oils and vegetable oil products, almost exclusively with R,R,R configuration. Tocotrienols differ from tocopherols only in having three double bonds in the hydrocarbon chain.. vitamin E : Any member of a group of fat-soluble chromanols that exhibit biological activity against vitamin E deficiency. The vitamers in this class consists of a chroman-6-ol core which is substituted at position 2 by a methyl group and (also at position 2) either a saturated or a triply-unsaturated hydrocarbon chain consisting of three isoprenoid units. The major function of vitamin E is to act as a natural antioxidant by scavenging free radicals and molecular oxygen.. (R,R,R)-alpha-tocopherol : An alpha-tocopherol that has R,R,R configuration. The naturally occurring stereoisomer of alpha-tocopherol, it is found particularly in sunflower and olive oils.	3.25	6	0	alpha-tocopherol	algal metabolite; antiatherogenic agent; anticoagulant; antioxidant; antiviral agent; EC 2.7.11.13 (protein kinase C) inhibitor; immunomodulator; micronutrient; nutraceutical; plant metabolite
selenomethionine [no description available]	1.99	1	0	selenoamino acid; selenomethionines	plant metabolite
paraquat Paraquat: A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.. paraquat : An organic cation that consists of 4,4'-bipyridine bearing two N-methyl substituents loctated at the 1- and 1'-positions.	3.09	1	0	organic cation	geroprotector; herbicide
methionine sulfoximine methionine sulfoximine : A non-proteinogenic alpha-amino acid that is the sulfoximine derivative of methionine .	1.98	1	0	methionine derivative; non-proteinogenic alpha-amino acid; sulfoximide
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.	9.43	37	1	isothiocyanate	antineoplastic agent; EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor; metabolite
thioflavin t thioflavin T: RN given refers to chloride; structure. thioflavine T : An organic chloride salt having 2-[4-(dimethylamino)phenyl]-3,6-dimethyl-1,3-benzothiazol-3-ium as the counterion. It is widely used to visualise and quantify the presence of amyloids, both in vitro and in vivo.	2.31	1	0	organic chloride salt	fluorochrome; geroprotector; histological dye
6-hydroxyadenosine [no description available]	2.25	1	0
amitriptyline n-oxide [no description available]	2.25	1	0	organic tricyclic compound
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.	1.98	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
limonene Limonene: A naturally-occurring class of MONOTERPENES which occur as a clear colorless liquid at room temperature. Limonene is the major component in the oil of oranges which has many uses, including as flavor and fragrance. It is recognized as safe in food by the Food and Drug Administration (FDA).. limonene : A monoterpene that is cyclohex-1-ene substituted by a methyl group at position 1 and a prop-1-en-2-yl group at position 4 respectively.	2.39	2	0	cycloalkene; p-menthadiene	human metabolite
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.	3.58	2	0	cadmium molecular entity; zinc group element atom
deuterium Deuterium: The stable isotope of hydrogen. It has one neutron and one proton in the nucleus.	3.07	5	0	dihydrogen
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.	3.12	5	0	elemental molecule; gas molecular entity; reactive oxygen species; triatomic oxygen	antiseptic drug; disinfectant; electrophilic reagent; greenhouse gas; mutagen; oxidising agent; tracer
sodium selenite disodium selenite : An inorganic sodium salt composed of sodium and selenite ions in a 2:1 ratio.	1.98	1	0	inorganic sodium salt; selenite salt	nutraceutical
cadmium chloride Cadmium Chloride: A cadmium halide in the form of colorless crystals, soluble in water, methanol, and ethanol. It is used in photography, in dyeing, and calico printing, and as a solution to precipitate sulfides. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed). cadmium dichloride : A cadmium coordination entity in which cadmium(2+) and Cl(-) ions are present in the ratio 2:1. Although considered to be ionic, it has considerable covalent character to its bonding.	2.13	1	0	cadmium coordination entity
vinyl carbamate vinyl carbamate: promutagen & more carcinogenic analog of ethyl carbamate (urethane); structure	3.13	5	0	carbamate ester
n'-nitrosonornicotine N'-nitrosonornicotine: structure; a potent carcinogen in laboratory animals	10.49	129	0	pyridines; pyrrolidines
tetradecanoylphorbol acetate Tetradecanoylphorbol Acetate: A phorbol ester found in CROTON OIL with very effective tumor promoting activity. It stimulates the synthesis of both DNA and RNA.. phorbol ester : Esters of phorbol, originally found in croton oil (from Croton tiglium, of the family Euphorbiaceae). A number of phorbol esters possess activity as tumour promoters and activate the mechanisms associated with cell growth. Some of these are used in experiments as activators of protein kinase C.. phorbol 13-acetate 12-myristate : A phorbol ester that is phorbol in which the hydroxy groups at the cyclopropane ring juction (position 13) and the adjacent carbon (position 12) have been converted into the corresponding acetate and myristate esters. It is a major active constituent of the seed oil of Croton tiglium. It has been used as a tumour promoting agent for skin carcinogenesis in rodents and is associated with increased cell proliferation of malignant cells. However its function is controversial since a decrease in cell proliferation has also been observed in several cancer cell types.	3.24	6	0	acetate ester; diester; phorbol ester; tertiary alpha-hydroxy ketone; tetradecanoate ester	antineoplastic agent; apoptosis inducer; carcinogenic agent; mitogen; plant metabolite; protein kinase C agonist; reactive oxygen species generator
n-nitrosoheptamethyleneimine [no description available]	1.97	1	0	nitrosamine
phosphotyrosine Phosphotyrosine: An amino acid that occurs in endogenous proteins. Tyrosine phosphorylation and dephosphorylation plays a role in cellular signal transduction and possibly in cell growth control and carcinogenesis.. O(4)-phospho-L-tyrosine : A non-proteinogenic L-alpha-amino acid that is L-tyrosine phosphorylated at the phenolic hydroxy group.	2.01	1	0	L-tyrosine derivative; non-proteinogenic L-alpha-amino acid; O(4)-phosphotyrosine	Escherichia coli metabolite; immunogen
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.	2.04	1	0	benzenes; phenyl acetates
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.	7.13	7	3	ortho- and peri-fused polycyclic arene	fluorescent probe; persistent organic pollutant
zidovudine Zidovudine: A dideoxynucleoside compound in which the 3'-hydroxy group on the sugar moiety has been replaced by an azido group. 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, acting as a chain-terminator of viral DNA during reverse transcription. It improves immunologic function, partially reverses the HIV-induced neurological dysfunction, and improves certain other clinical abnormalities associated with AIDS. Its principal toxic effect is dose-dependent suppression of bone marrow, resulting in anemia and leukopenia.. zidovudine : A pyrimidine 2',3'-dideoxyribonucleoside compound having a 3'-azido substituent and thymine as the nucleobase.	2.25	1	0	azide; pyrimidine 2',3'-dideoxyribonucleoside	antimetabolite; antiviral drug; HIV-1 reverse transcriptase inhibitor
4-ipomeanol 4-ipomeanol: lung-toxic furanoterpenoid produced in moldy sweet potatoes in response to fungus infection; RN given refers to cpd without isomeric designation; structure	4	4	0	aromatic ketone
paclitaxel Taxus: Genus of coniferous yew trees or shrubs, several species of which have medicinal uses. Notable is the Pacific yew, Taxus brevifolia, which is used to make the anti-neoplastic drug taxol (PACLITAXEL).	2	1	0	taxane diterpenoid; tetracyclic diterpenoid	antineoplastic agent; human metabolite; metabolite; microtubule-stabilising agent
etoposide [no description available]	2.05	1	0	beta-D-glucoside; furonaphthodioxole; organic heterotetracyclic compound	antineoplastic agent; DNA synthesis inhibitor
1,6-dinitropyrene [no description available]	1.99	1	0	pyrenes
chlorodiphenyl (54% chlorine) Chlorodiphenyl (54% Chlorine): A mixture of polychlorinated biphenyls that induces hepatic microsomal UDP-glucuronyl transferase activity towards thyroxine.. Aroclor 1254 : A mixture of polychlorobiphenyls of unspecified composition, containing 54% chlorine (X = Cl or H).	1.98	1	0
diisopropanolnitrosamine diisopropanolnitrosamine: experimental carcinogen. N,N-bis(2-hydroxypropyl)nitrosamine : A nitrosamine that is dipropylamine in which the hydrogen attached to the nitrogen has been replaced by a nitroso group. It is a genotoxic carcinogen, targeting the lung, liver, thyroid, and kidney.	2.47	2	0	diol; nitrosamine; secondary alcohol	carcinogenic agent
7,8-dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide 7,8-Dihydro-7,8-dihydroxybenzo(a)pyrene 9,10-oxide: 7,8,8a,9a-Tetrahydrobenzo(10,11)chryseno (3,4-b)oxirene-7,8-diol. A benzopyrene derivative with carcinogenic and mutagenic activity.	2.03	1	0	epoxide	intercalator
methyl(acetoxymethyl)nitrosamine methyl(acetoxymethyl)nitrosamine: RN given refers to parent cpd; structure in seventh source	3.09	5	0
nitrosobis(2-oxopropyl)amine nitrosobis(2-oxopropyl)amine: structure. nitrosobis(2-oxopropyl)amine : A nitrosamine that is iminodiacetone that is substituted by a nitroso group at the N-atom. It induces pancreatic ductal adenocarcinomas in Syrian golden hamsters (other rodents are not susceptible).	2.39	2	0	ketone; nitrosamine	carcinogenic agent
oltipraz oltipraz : A 1,2-dithiole that is 3H-1,2-dithiole-3-thione substituted at positions 4 and 5 by methyl and pyrazin-2-yl groups respectively.	1.98	1	0	1,2-dithiole; pyrazines	angiogenesis modulating agent; antimutagen; antineoplastic agent; antioxidant; EC 3.1.3.48 (protein-tyrosine-phosphatase) inhibitor; neurotoxin; protective agent; schistosomicide drug
lovastatin Lovastatin: A fungal metabolite isolated from cultures of Aspergillus terreus. The compound is a potent anticholesteremic agent. It inhibits 3-hydroxy-3-methylglutaryl coenzyme A reductase (HYDROXYMETHYLGLUTARYL COA REDUCTASES), which is the rate-limiting enzyme in cholesterol biosynthesis. It also stimulates the production of low-density lipoprotein receptors in the liver.. lovastatin : A fatty acid ester that is mevastatin carrying an additional methyl group on the carbobicyclic skeleton. It is used in as an anticholesteremic drug and has been found in fungal species such as Aspergillus terreus and Pleurotus ostreatus (oyster mushroom).	1.99	1	0	delta-lactone; fatty acid ester; hexahydronaphthalenes; polyketide; statin (naturally occurring)	anticholesteremic drug; antineoplastic agent; Aspergillus metabolite; prodrug
2-amino-3-methylimidazo(4,5-f)quinoline 2-amino-3-methylimidazo(4,5-f)quinoline: mutagen found in broiled food; RN given refers to parent cpd; structure given in first source; frequently abbreviated as IQ in the literature. 3-methyl-3H-imidazo[4,5-f]quinolin-2-amine : An imidazoquinoline that is 3H-imidazo[4,5-f]quinoline substituted by a methyl group at position 3 and an amino group at position 2.	1.99	1	0	imidazoquinoline	carcinogenic agent
mifepristone Mifepristone: A progestational and glucocorticoid hormone antagonist. Its inhibition of progesterone induces bleeding during the luteal phase and in early pregnancy by releasing endogenous prostaglandins from the endometrium or decidua. As a glucocorticoid receptor antagonist, the drug has been used to treat hypercortisolism in patients with nonpituitary CUSHING SYNDROME.	2.17	1	0	3-oxo-Delta(4) steroid; acetylenic compound; tertiary amino compound	abortifacient; contraceptive drug; hormone antagonist; synthetic oral contraceptive
zileuton [no description available]	2.25	1	0	1-benzothiophenes; ureas	anti-asthmatic drug; EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor; ferroptosis inhibitor; leukotriene antagonist; non-steroidal anti-inflammatory drug
atorvastatin [no description available]	2.07	1	0	aromatic amide; dihydroxy monocarboxylic acid; monofluorobenzenes; pyrroles; statin (synthetic)	environmental contaminant; xenobiotic
ziprasidone ziprasidone: a benzisothiazoylpiperazine derivative; has combined dopamine and serotonin receptor antagonist activity; structurally related to tiospirone. ziprasidone : A piperazine compound having 1,2-benzothiazol-3-yl- and 2-(6-chloro-1,3-dihydro-2-oxindol-5-yl)ethyl substituents attached to the nitrogen atoms.	2.25	1	0	1,2-benzisothiazole; indolones; organochlorine compound; piperazines	antipsychotic agent; dopaminergic antagonist; histamine antagonist; muscarinic antagonist; psychotropic drug; serotonergic antagonist
dimethylhydrazines Dimethylhydrazines: Hydrazines substituted with two methyl groups in any position.	2.69	3	0
n-nitrosoguvacoline N-nitrosoguvacoline: formed by nitrosation of arecoline	1.96	1	0	citraconoyl group
3-(methylnitrosamino)propionitrile 3-(methylnitrosamino)propionitrile: formed from the alkaloid of betel quid	2.37	2	0	nitroso compound
4-(methylnitrosamino)-4-(3-pyridyl)butanal 4-(methylnitrosamino)-4-(3-pyridyl)butanal: structure given in first source	3.81	4	0
2-amino-3,4-dimethylimidazo(4,5-f)quinoline 2-amino-3,4-dimethylimidazo(4,5-f)quinoline: strong mutagens found in broiled food; structure given in first source	2.13	1	0	aminoquinoline
isothiocyanic acid [no description available]	2.67	3	0	hydracid; one-carbon compound
glucose, (beta-d)-isomer beta-D-glucose : D-Glucopyranose with beta configuration at the anomeric centre.. (1->4)-beta-D-glucan : A beta-D-glucan in which the glucose units are connected by (1->4) linkages.. (1->3)-beta-D-glucan : A beta-D-glucan in which the glucose units are connected by (1->3) linkages.	2.13	1	0	D-glucopyranose	epitope; mouse metabolite
5-methylcytosine 5-Methylcytosine: A methylated nucleotide base found in eukaryotic DNA. In ANIMALS, the DNA METHYLATION of CYTOSINE to form 5-methylcytosine is found primarily in the palindromic sequence CpG. In PLANTS, the methylated sequence is CpNpGp, where N can be any base.. 5-methylcytosine : A pyrimidine that is a derivative of cytosine, having a methyl group at the 5-position.	2.02	1	0	methylcytosine; pyrimidines	human metabolite
methylthymidine methylthymidine: RN given refers to N-3-methylthymidine	2.06	1	0
epigallocatechin gallate epigallocatechin gallate: a steroid 5alpha-reductase inhibitor and antimutagen in green tea (Camellia sinensis). (-)-epigallocatechin 3-gallate : A gallate ester obtained by the formal condensation of gallic acid with the (3R)-hydroxy group of (-)-epigallocatechin.	4.5	7	0	flavans; gallate ester; polyphenol	antineoplastic agent; antioxidant; apoptosis inducer; geroprotector; Hsp90 inhibitor; neuroprotective agent; plant metabolite
gallocatechol gallocatechol: structure give in first source; RN given for (trans-(+-))-omer; inhibits DNA-dependent DNA & RNA polymerases. (+)-gallocatechin : A gallocatechin that has (2R,3S)-configuration. It is found in green tea and bananas.. gallocatechin : A catechin that is a flavan substituted by hydroxy groups at positions 3, 3', 4', 5, 5' and 7 (the trans isomer). It is isolated from Acacia mearnsii.	2.42	2	0	gallocatechin	antioxidant; metabolite; radical scavenger
o-(6)-methylguanine O-(6)-methylguanine: structure. 6-O-methylguanine : A methylguanine in which the methyl group is positioned on the oxygen at position 6. Formed in DNA by alkylation of the oxygen atom of guanine, most often by N-nitroso compounds and sometimes due to methylation by other compounds such as endogenous S-adenosylmethionine, it base-pairs to thymine rather than cytidine, causing a G:C to A:T transition in DNA.. methylguanine : A 2-aminopurine that is guanine bearing a single methyl substituent.	4.85	34	0	methylguanine	mutagen
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.	2.07	1	0	1,2,3-triazole
2,6-dimethoxy-1,4-benzoquinone 2,6-dimethoxy-1,4-benzoquinone: structure given in first source	2.31	1	0
drospirenone drospirenone: a progestational compound with antimineralocorticoid and antiandrogenic activity; structure given in first source	2.15	1	0	3-oxo-Delta(4) steroid; steroid lactone	aldosterone antagonist; contraceptive drug; progestin
2-hydroxychavicol 2-hydroxychavicol: antimutagen from betel leaf; structure given in first source	1.97	1	0
masoprocol Masoprocol: A potent lipoxygenase inhibitor that interferes with arachidonic acid metabolism. The compound also inhibits formyltetrahydrofolate synthetase, carboxylesterase, and cyclooxygenase to a lesser extent. It also serves as an antioxidant in fats and oils.. masoprocol : The meso-form of nordihydroguaiaretic acid. An antioxidant found in the creosote bush, Larrea divaricata, it is a potent lipoxygenase inhibitor that interferes with arachidonic acid metabolism. It also inhibits (though to a lesser extent) formyltetrahydrofolate synthetase, carboxylesterase, and cyclooxygenase.	1.99	1	0	nordihydroguaiaretic acid	antineoplastic agent; hypoglycemic agent; lipoxygenase inhibitor; metabolite
a 78773 A 78773: a 5-lipoxygenase inhibitor	1.99	1	0
bufuralol bufuralol: RN given refers to cpd without isomeric designation; structure	1.98	1	0	benzofurans
7-hydroxystaurosporine [no description available]	2.04	1	0
honokiol [no description available]	2.13	1	0	biphenyls
nobiletin nobiletin : A methoxyflavone that is flavone substituted by methoxy groups at positions 5, 6, 7, 8, 3' and 4' respectively.	2.21	1	0	methoxyflavone	antineoplastic agent; plant metabolite
nicotinamide n-oxide [no description available]	2.25	1	0	pyridines
o(6)-methyl-2'-deoxyguanosine O(6)-methyl-2'-deoxyguanosine: RN given refers to (beta)-isomer. O(6)-methyl-2'-deoxyguanosine : A purine 2'-deoxyribonucleoside having O(6)-methylguanine as the nucleobase.	2.66	3	0	purine 2'-deoxyribonucleoside
bexarotene [no description available]	2.03	1	0	benzoic acids; naphthalenes; retinoid	antineoplastic agent
7,8-dihydromethysticin [no description available]	2.81	3	0	2-pyranones; aromatic ether
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.	14.46	127	10	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
gamma-tocopherol gamma-Tocopherol: A natural tocopherol with less antioxidant activity than ALPHA-TOCOPHEROL. It exhibits antioxidant activity by virtue of the phenolic hydrogen on the 2H-1-benzopyran-6-ol nucleus. As in BETA-TOCOPHEROL, it also has three methyl groups on the 6-chromanol nucleus but at different sites.. gamma-tocopherol : A tocopherol in which the chroman-6-ol core is substituted by methyl groups at positions 7 and 8. It is found particularly in maize (corn) oil and soya bean (soybean) oils.	2.05	1	0	tocopherol; vitamin E	algal metabolite; food antioxidant; plant metabolite
coumarin 7 coumarin 7: structure in first source	2.11	1	0
glucuronic acid Glucuronic Acid: A sugar acid formed by the oxidation of the C-6 carbon of GLUCOSE. In addition to being a key intermediate metabolite of the uronic acid pathway, glucuronic acid also plays a role in the detoxification of certain drugs and toxins by conjugating with them to form GLUCURONIDES.. D-glucuronic acid : The D-enantiomer of glucuronic acid.. D-glucopyranuronic acid : A D-glucuronic acid in cyclic pyranose form.	1.98	1	0	D-glucuronic acid	algal metabolite
6'-o-methylguanosine [no description available]	2.02	1	0
fulvestrant Fulvestrant: An estradiol derivative and estrogen receptor antagonist that is used for the treatment of estrogen receptor-positive, locally advanced or metastatic breast cancer.. fulvestrant : A 3-hydroxy steroid that is 17beta-estradiol in which the 7alpha hydrogen has been replaced by a nonyl group in which one of the hydrogens of the terminal methyl has been replaced by a (4,4,5,5,5-pentafluoropentyl)sulfinyl group. An estrogen receptor antagonist, it is used in the treatment of breast cancer.	2.07	1	0	17beta-hydroxy steroid; 3-hydroxy steroid; organofluorine compound; sulfoxide	antineoplastic agent; estrogen antagonist; estrogen receptor antagonist
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.	13.06	84	4	nitrosamine; pyridines; secondary alcohol	biomarker; carcinogenic agent; human urinary metabolite
prolinedithiocarbamate prolinedithiocarbamate: do not confuse with pyrrolidine dithiocarbamate which is also abbreviated PDTC	2	1	0
4-(methylnitrosoamino)-4-(3-pyridyl)-1-butanol 4-(methylnitrosoamino)-4-(3-pyridyl)-1-butanol: tobacco-specific N-nitrosamine; structure given in first source	6.59	15	0
epibatidine epibatidine: a powerful, though toxic, pain killer produced by the poison arrow frog, Epipedobates tricolor; structure given in first source; more potent than morphine but acts at nicotine rather than opiate receptors	1.99	1	0
methyllycaconitine methyllycaconitine: natural toxin from seeds of Delphinium brownii; parasympathomimetic and mild nicotine antagonist; antagonist of alpha-conotoxin-MII sensitive presynaptic nicotinic receptors; potent insecticide; RN refers to (1alpha,4(S),6beta,14alpha,16beta)-isomer	2.07	1	0
4-hydoxy-1-(3-pyridyl)-1-butanone 4-hydoxy-1-(3-pyridyl)-1-butanone: structure given in first source; may be metabolic product of tobacco-specific nitrosamines	4.6	8	0	aromatic ketone
procyanidin Proanthocyanidins: Dimers and oligomers of flavan-3-ol units (CATECHIN analogs) linked mainly through C4 to C8 bonds to leucoanthocyanidins. They are structurally similar to ANTHOCYANINS but are the result of a different fork in biosynthetic pathways.	2.75	3	0	proanthocyanidin
epicatechin gallate epicatechin gallate: a steroid 5alpha-reductase inhibitor; RN given refers to the (cis)-isomer; structure given in first source; isolated from green tea. (-)-epicatechin-3-O-gallate : A gallate ester obtained by formal condensation of the carboxy group of gallic acid with the (3R)-hydroxy group of epicatechin. A natural product found in Parapiptadenia rigida.	2.07	1	0	catechin; gallate ester; polyphenol	EC 3.2.1.1 (alpha-amylase) inhibitor; EC 3.2.1.20 (alpha-glucosidase) inhibitor; metabolite
deguelin deguelin: a natural product from Mundulea sericea; RN refers to (7aS-cis)-isomer; structure given in first source. deguelin : A rotenone that is 13,13a-dihydro-3H-chromeno[3,4-b]pyrano[2,3-h]chromen-7(7aH)-one substituted by methoxy groups at positions 9 and 10, and by two methyl groups at position 3 (the 7aS,13aS-stereoisomer). It exists in abundant quantities in the bark, roots, and leaves of the Leguminosae family of plants and reported to exert anti-tumour effects in various cancers.	2.43	2	0	aromatic ether; diether; organic heteropentacyclic compound; rotenones	angiogenesis inhibitor; anti-inflammatory agent; antineoplastic agent; antiviral agent; apoptosis inducer; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor; mitochondrial NADH:ubiquinone reductase inhibitor; plant metabolite
hydroxycotinine hydroxycotinine: metabolite of nicotine; RN given refers to (S)-isomer; structure. trans-3-hydroxycotinine : An N-alkylpyrrolidine that is cotinine substituted at position C-3 by a hydroxy group (the 3R,5S-diastereomer).	3.14	5	0	N-alkylpyrrolidine; pyridines; pyrrolidin-2-ones; pyrrolidine alkaloid
proanthocyanidin proanthocyanidin: RN given refers to proanthocyanidin A; Cannabinoid Receptor CB1 antagonist. proanthocyanidin : A flavonoid oligomer obtained by the the condensation of two or more units of hydroxyflavans.	2.05	1	0
parthenolide [no description available]	2.06	1	0	germacranolide
cotinine-n-oxide cotinine-N-oxide: metabolite of nicotine; structure	2.4	2	0
6-phenylhexyl isothiocyanate [no description available]	2.9	4	0
2-ethynylnaphthalene 2-ethynylnaphthalene: RN given refers to unlabeled parent cpd	1.98	1	0
s-(3-hydroxypropyl)cysteine n-acetate [no description available]	2.1	1	0	N-acyl-L-amino acid
4-(acetoxymethylnitrosamino)-1-(3-pyridyl)-1-butanone 4-(acetoxymethylnitrosamino)-1-(3-pyridyl)-1-butanone: structure given in first source; a pyridyloxobutylating agent used for altering DNA	3.71	10	0
peroxynitrous acid Peroxynitrous Acid: A potent oxidant synthesized by the cell during its normal metabolism. Peroxynitrite is formed from the reaction of two free radicals, NITRIC OXIDE and the superoxide anion (SUPEROXIDES).	2.02	1	0	nitrogen oxoacid
gefitinib [no description available]	2.47	2	0	aromatic ether; monochlorobenzenes; monofluorobenzenes; morpholines; quinazolines; secondary amino compound; tertiary amino compound	antineoplastic agent; epidermal growth factor receptor antagonist
proline Proline: A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons.. proline : An alpha-amino acid that is pyrrolidine bearing a carboxy substituent at position 2.	2	1	0	amino acid zwitterion; glutamine family amino acid; L-alpha-amino acid; proline; proteinogenic amino acid	algal metabolite; compatible osmolytes; Escherichia coli metabolite; micronutrient; mouse metabolite; nutraceutical; Saccharomyces cerevisiae metabolite
naproxen Naproxen: An anti-inflammatory agent with analgesic and antipyretic properties. Both the acid and its sodium salt are used in the treatment of rheumatoid arthritis and other rheumatic or musculoskeletal disorders, dysmenorrhea, and acute gout.. naproxen : A methoxynaphthalene that is 2-methoxynaphthalene substituted by a carboxy ethyl group at position 6. Naproxen is a non-steroidal anti-inflammatory drug commonly used for the reduction of pain, fever, inflammation and stiffness caused by conditions such as osteoarthritis, kidney stones, rheumatoid arthritis, psoriatic arthritis, gout, ankylosing spondylitis, menstrual cramps, tendinitis, bursitis, and for the treatment of primary dysmenorrhea. It works by inhibiting both the COX-1 and COX-2 enzymes.	2.39	2	0	methoxynaphthalene; monocarboxylic acid	antipyretic; cyclooxygenase 1 inhibitor; cyclooxygenase 2 inhibitor; drug allergen; environmental contaminant; gout suppressant; non-narcotic analgesic; non-steroidal anti-inflammatory drug; xenobiotic
diallyl sulfone diallyl sulfone: metabolite of diallyl sulfide	3.1	1	0
oracine oracine: structure in first source; 11-dihydrooracin is the enantiomer	2.03	1	0
6-methylthiohexyl isothiocyanate 6-methylthiohexyl isothiocyanate: isolated from Wasabia japonica (wasabi). 1-isothiocyanato-6-(methylsulfanyl)hexane : A isothiocyanate that is hexane in which two of the terminal methyl hydrogens at positions 1 and 6 have been replaced by isothiocyanato and methylsulfanyl groups.	2	1	0	isothiocyanate; methyl sulfide	antineoplastic agent; Arabidopsis thaliana metabolite; EC 4.1.1.17 (ornithine decarboxylase) inhibitor; neuroprotective agent
biotin vitamin B7 : Any member of a group of vitamers that belong to the chemical structural class called biotins that exhibit biological activity against vitamin B7 deficiency. Vitamin B7 deficiency is very rare in individuals who take a normal balanced diet. Foods rich in biotin are egg yolk, liver, cereals, vegetables (spinach, mushrooms) and rice. Symptoms associated with vitamin B7 deficiency include thinning hair, scaly skin rashes around eyes, nose and mouth, and brittle nails. The vitamers include biotin and its ionized and salt forms.	1.96	1	0	biotins; vitamin B7	coenzyme; cofactor; Escherichia coli metabolite; fundamental metabolite; human metabolite; mouse metabolite; nutraceutical; prosthetic group; Saccharomyces cerevisiae metabolite
atropine tropan-3alpha-yl 3-hydroxy-2-phenylpropanoate : A tropane alkaloid that is (1R,5)-8-methyl-8-azabicyclo[3.2.1]octane substituted by a (3-hydroxy-2-phenylpropanoyl)oxy group at position 3.	2.44	2	0
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.	2.11	1	0
erlotinib hydrochloride [no description available]	2.13	1	0	hydrochloride; terminal acetylenic compound	antineoplastic agent; protein kinase inhibitor
cotinine n-glucuronide cotinine N-glucuronide: structure given in first source; a major urinary metabolite of nicotine	2	1	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.	3.12	5	0	aflatoxin; aromatic ether; aromatic ketone	carcinogenic agent; human metabolite
n(4)-hydroxycytidine N(4)-hydroxycytidine : A nucleoside analogue that is cytidine which carries a hydroxy group at the N(4)-positon. It has broad-spectrum antiviral activity against influenza, SARS-CoV , SARS-CoV-2 and MERS-CoV.	2.25	1	0	ketoxime; nucleoside analogue	anticoronaviral agent; antiviral agent; drug metabolite; human xenobiotic metabolite
anabasine Anabasine: A piperidine botanical insecticide.. (S)-anabasine : The (S)-enantiomer of anabasine.. anabasine : A pyridine alkaloid that is pyridine substituted by a piperidin-2-yl group at position 3.	2.7	3	0	anabasine
cortisone [no description available]	2.41	2	0	11-oxo steroid; 17alpha-hydroxy steroid; 20-oxo steroid; 21-hydroxy steroid; 3-oxo-Delta(4) steroid; C21-steroid; glucocorticoid; primary alpha-hydroxy ketone; tertiary alpha-hydroxy ketone	human metabolite; mouse metabolite
3-nitrotyrosine 3-nitrotyrosine: RN given refers to parent cpd without isomeric designation. 3-nitrotyrosine : A nitrotyrosine comprising tyrosine having a nitro group at the 3-position on the phenyl ring.	2.74	3	0	2-nitrophenols; C-nitro compound; nitrotyrosine; non-proteinogenic alpha-amino acid
wortmannin [no description available]	2.31	1	0	acetate ester; cyclic ketone; delta-lactone; organic heteropentacyclic compound	anticoronaviral agent; antineoplastic agent; autophagy inhibitor; EC 2.7.1.137 (phosphatidylinositol 3-kinase) inhibitor; geroprotector; Penicillium metabolite; radiosensitizing agent
2,2-bis(hydroxymethyl)-1-azabicyclo(2,2,2,)octan-3-one 2,2-bis(hydroxymethyl)-1-azabicyclo(2,2,2,)octan-3-one: structure in first source	2.08	1	0	cyclic ketone; quinuclidines
5-demethylnobiletin 5-demethylnobiletin: antineoplastic from Citrus plants; structure in first source	2.15	1	0	ether; flavonoids
fti 276 FTI 276: a ras CAAX (C - Cys; A - aliphatic amino acid; X - Ser or Met) peptidomimetic; inhibits farnesyltransferase; FTI-277 is the methyl ester derivative of FTI-276	2	1	0	methionine derivative
leptomycin b [no description available]	2.11	1	0
mevalonic acid Mevalonic Acid: A dihydroxy monocarboxylic acid and precursor in the biosynthetic pathway known as the mevalonate pathway, which produces terpenes and steroids that are vital for diverse cellular functions.. mevalonic acid : A racemate composed of equimolar amounts of (R)- and (S)-mevalonic acid.. (R)-mevalonic acid : The (R)-enantiomer of mevalonic acid.	2.21	1	0	3,5-dihydroxy-3-methylpentanoic acid
naringin [no description available]	2.03	1	0	(2S)-flavan-4-one; 4'-hydroxyflavanones; dihydroxyflavanone; disaccharide derivative; neohesperidoside	anti-inflammatory agent; antineoplastic agent; metabolite
myosmine myosmine: alkaloid found in Nicotiana; structure. myosmine : A member of the class of pyridines that is pyridine substituted by a 3,4-dihydro-2H-pyrrol-5-yl group at position 3. It is an alkaloid found in tobacco plants and exhibits genotoxic effects.	2.05	1	0	pyridine alkaloid; pyrroline	EC 1.14.14.14 (aromatase) inhibitor; mutagen; plant metabolite
lignans Lignans: A class of dibenzylbutane derivatives which occurs in higher plants and in fluids (bile, serum, urine, etc.) in man and other animals. These compounds, which have a potential anti-cancer role, can be synthesized in vitro by human fecal flora. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed)	2.13	1	0
ergosterol [no description available]	2.11	1	0	3beta-hydroxy-Delta(5)-steroid; 3beta-sterol; ergostanoid; phytosterols	fungal metabolite; Saccharomyces cerevisiae metabolite
tretinoin Tretinoin: An important regulator of GENE EXPRESSION during growth and development, and in NEOPLASMS. Tretinoin, also known as retinoic acid and derived from maternal VITAMIN A, is essential for normal GROWTH; and EMBRYONIC DEVELOPMENT. An excess of tretinoin can be teratogenic. It is used in the treatment of PSORIASIS; ACNE VULGARIS; and several other SKIN DISEASES. It has also been approved for use in promyelocytic leukemia (LEUKEMIA, PROMYELOCYTIC, ACUTE).. retinoic acid : A retinoid consisting of 3,7-dimethylnona-2,4,6,8-tetraenoic acid substituted at position 9 by a 2,6,6-trimethylcyclohex-1-en-1-yl group (geometry of the four exocyclic double bonds is not specified).. all-trans-retinoic acid : A retinoic acid in which all four exocyclic double bonds have E- (trans-) geometry.	3.42	7	0	retinoic acid; vitamin A	anti-inflammatory agent; antineoplastic agent; antioxidant; AP-1 antagonist; human metabolite; keratolytic drug; retinoic acid receptor agonist; retinoid X receptor agonist; signalling molecule
arachidonic acid icosa-5,8,11,14-tetraenoic acid : Any icosatetraenoic acid with the double bonds at positions 5, 8, 11 and 14.. arachidonate : A long-chain fatty acid anion resulting from the removal of a proton from the carboxy group of arachidonic acid.	3.1	5	0	icosa-5,8,11,14-tetraenoic acid; long-chain fatty acid; omega-6 fatty acid	Daphnia galeata metabolite; EC 3.1.1.1 (carboxylesterase) inhibitor; human metabolite; mouse metabolite
3-hydroxy-3-methylglutaryl-coenzyme a 3-hydroxy-3-methylglutaryl-coenzyme A: RN given refers to cpd without isomeric designation. 3-hydroxy-3-methylglutaryl-CoA : An alpha,omega dicarboxyacyl-CoA that results from the formal condensation of the thiol group of coenzyme A with one of the carboxy groups of 3-hydroxy-3-methylglutaric acid.. (3S)-3-hydroxy-3-methylglutaryl-CoA : A 3-hydroxy-3-methylglutaryl-CoA where the 3-hydroxy-3-methylglutaryl component has (S)-configuration.	2.21	1	0	3-hydroxy-3-methylglutaryl-CoA; 3-hydroxy fatty acyl-CoA	human metabolite; mouse metabolite
resveratrol trans-resveratrol : A resveratrol in which the double bond has E configuration.	2	1	0	resveratrol	antioxidant; phytoalexin; plant metabolite; quorum sensing inhibitor; radical scavenger
retinol Vitamin A: Retinol and derivatives of retinol that play an essential role in metabolic functioning of the retina, the growth of and differentiation of epithelial tissue, the growth of bone, reproduction, and the immune response. Dietary vitamin A is derived from a variety of CAROTENOIDS found in plants. It is enriched in the liver, egg yolks, and the fat component of dairy products.. vitamin A : Any member of a group of fat-soluble retinoids produced via metabolism of provitamin A carotenoids that exhibit biological activity against vitamin A deficiency. Vitamin A is involved in immune function, vision, reproduction, and cellular communication.. all-trans-retinol : A retinol in which all four exocyclic double bonds have E- (trans-) geometry.. retinol : A retinoid consisting of 3,7-dimethylnona-2,4,6,8-tetraen-1-ol substituted at position 9 by a 2,6,6-trimethylcyclohex-1-en-1-yl group (geometry of the four exocyclic double bonds is not specified).	3.23	6	0	retinol; vitamin A	human metabolite; mouse metabolite; plant metabolite
oleic acid Oleic Acid: An unsaturated fatty acid that is the most widely distributed and abundant fatty acid in nature. It is used commercially in the preparation of oleates and lotions, and as a pharmaceutical solvent. (Stedman, 26th ed). oleic acid : An octadec-9-enoic acid in which the double bond at C-9 has Z (cis) stereochemistry.	2.01	1	0	octadec-9-enoic acid	antioxidant; Daphnia galeata metabolite; EC 3.1.1.1 (carboxylesterase) inhibitor; Escherichia coli metabolite; mouse metabolite; plant metabolite; solvent
lycopene [no description available]	2.42	2	0	acyclic carotene	antioxidant; plant metabolite
alitretinoin Alitretinoin: A retinoid that is used for the treatment of chronic hand ECZEMA unresponsive to topical CORTICOSTEROIDS. It is also used to treat cutaneous lesions associated with AIDS-related KAPOSI SARCOMA.	2.73	3	0	retinoic acid	antineoplastic agent; keratolytic drug; metabolite; retinoid X receptor agonist
decitabine [no description available]	2.44	2	0	2'-deoxyribonucleoside
n'-nitrosoanatabine N'-nitrosoanatabine: nitroso cpd prepared from alkaloid anatabine; structure given in first source	3.85	12	0
bromochloroacetic acid Keratins: A class of fibrous proteins or scleroproteins that represents the principal constituent of EPIDERMIS; HAIR; NAILS; horny tissues, and the organic matrix of tooth ENAMEL. Two major conformational groups have been characterized, alpha-keratin, whose peptide backbone forms a coiled-coil alpha helical structure consisting of TYPE I KERATIN and a TYPE II KERATIN, and beta-keratin, whose backbone forms a zigzag or pleated sheet structure. alpha-Keratins have been classified into at least 20 subtypes. In addition multiple isoforms of subtypes have been found which may be due to GENE DUPLICATION.. bromochloroacetic acid : A monocarboxylic acid that is acetic acid in which one of the methyl hydrogens is replaced by bromine while a second is replaced by chlorine. A low-melting (27.5-31.5degreeC), hygroscopic crystalline solid, it can be formed during the disinfection (by chlorination) of water that contains bromide ions and organic matter, so can occur in drinking water as a byproduct of the disinfection process.	1.97	1	0	2-bromocarboxylic acid; monocarboxylic acid; organochlorine compound
chalcone trans-chalcone : The trans-isomer of chalcone.	2.06	1	0	chalcone	EC 3.2.1.1 (alpha-amylase) inhibitor
squalene Addavax: an oil-water nanoemulsion and adjuvant containing squalene, Tween 80, and sorbitane trioleate	1.99	1	0	triterpene	human metabolite; mouse metabolite; plant metabolite; Saccharomyces cerevisiae metabolite
stilbenes Stilbenes: Organic compounds that contain 1,2-diphenylethylene as a functional group.. trans-stilbene : The trans-isomer of stilbene.	2	1	0	stilbene
glucobrassicin glucobrassicin: isolated from Brussels sprouts; structure given in first source. glucobrassicin : An indolylmethylglucosinolic acid that is 1-thio-beta-D-glucopyranose having a 2-(1H-indol-3-yl)-N-(sulfooxy)ethanimidoyl group attached to the anomeric sulfur.	4.14	1	0	indolyl carbohydrate; indolylmethylglucosinolic acid
sesquiterpenes [no description available]	2.74	3	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.	11.06	49	5	N-alkylpyrrolidine; pyridines; pyrrolidin-2-ones; pyrrolidine alkaloid	antidepressant; biomarker; human xenobiotic metabolite; plant metabolite
curcumin Curcumin: A yellow-orange dye obtained from tumeric, the powdered root of CURCUMA longa. It is used in the preparation of curcuma paper and the detection of boron. Curcumin appears to possess a spectrum of pharmacological properties, due primarily to its inhibitory effects on metabolic enzymes.. curcumin : A beta-diketone that is methane in which two of the hydrogens are substituted by feruloyl groups. A natural dyestuff found in the root of Curcuma longa.	2	1	0	aromatic ether; beta-diketone; diarylheptanoid; enone; polyphenol	anti-inflammatory agent; antifungal agent; antineoplastic agent; biological pigment; contraceptive drug; dye; EC 1.1.1.205 (IMP dehydrogenase) inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.1.1.25 (shikimate dehydrogenase) inhibitor; EC 1.6.5.2 [NAD(P)H dehydrogenase (quinone)] inhibitor; EC 1.8.1.9 (thioredoxin reductase) inhibitor; EC 2.7.10.2 (non-specific protein-tyrosine kinase) inhibitor; EC 3.5.1.98 (histone deacetylase) inhibitor; flavouring agent; food colouring; geroprotector; hepatoprotective agent; immunomodulator; iron chelator; ligand; lipoxygenase inhibitor; metabolite; neuroprotective agent; nutraceutical; radical scavenger
sulindac Sulindac: A sulfinylindene derivative prodrug whose sulfinyl moiety is converted in vivo to an active NSAID analgesic. Specifically, the prodrug is converted by liver enzymes to a sulfide which is excreted in the bile and then reabsorbed from the intestine. This helps to maintain constant blood levels with reduced gastrointestinal side effects.. sulindac : A monocarboxylic acid that is 1-benzylidene-1H-indene which is substituted at positions 2, 3, and 5 by methyl, carboxymethyl, and fluorine respectively, and in which the phenyl group of the benzylidene moiety is substituted at the para position by a methylsulfinyl group. It is a prodrug for the corresponding sulfide, a non-steroidal anti-inflammatory drug, used particularly in the treatment of acute and chronic inflammatory conditions.	3.24	6	0	monocarboxylic acid; organofluorine compound; sulfoxide	analgesic; antineoplastic agent; antipyretic; apoptosis inducer; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; non-narcotic analgesic; non-steroidal anti-inflammatory drug; prodrug; tocolytic agent
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.	1.98	1	0	capsaicinoid	non-narcotic analgesic; TRPV1 agonist; voltage-gated sodium channel blocker
thiourea Thiourea: A photographic fixative used also in the manufacture of resins. According to the Fourth Annual Report on Carcinogens (NTP 85-002, 1985), this substance may reasonably be anticipated to be a carcinogen (Merck Index, 9th ed). Many of its derivatives are ANTITHYROID AGENTS and/or FREE RADICAL SCAVENGERS.. thiourea : The simplest member of the thiourea class, consisting of urea with the oxygen atom substituted by sulfur.	2.42	2	0	one-carbon compound; thioureas; ureas	antioxidant; chromophore
tamoxifen [no description available]	1.97	1	0	stilbenoid; tertiary amino compound	angiogenesis inhibitor; antineoplastic agent; bone density conservation agent; EC 1.2.3.1 (aldehyde oxidase) inhibitor; EC 2.7.11.13 (protein kinase C) inhibitor; estrogen antagonist; estrogen receptor antagonist; estrogen receptor modulator
nadp [no description available]	3.26	6	0
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.	2.4	2	0	nitrogen oxide
boc-tyr(s03)-nle-gly-trp-nle-asp-2-phenylethyl ester JMV 180: distinguishes high-affinity cholecystokinin receptors from low-affinity cholecystokinin receptors; RN given refers to (S)-isomer	2.07	1	0
thymidine glycol thymidine glycol: RN given refers to cpd without isomeric designation	3.84	2	0	pyrimidine 2'-deoxyribonucleoside
ovalbumin Ovalbumin: An albumin obtained from the white of eggs. It is a member of the serpin superfamily.	2.17	1	0
l 663536 MK-886: orally active leukotriene biosynthesis inhibitor. 3-[3-(tert-butylsulfanyl)-1-(4-chlorobenzyl)-5-(propan-2-yl)-1H-indol-2-yl]-2,2-dimethylpropanoic acid : A member of the class of indoles that is 1H-indole substituted by a isopropyl group at position 5, a tert-butylsulfanediyl group at position 3, a 4-chlorobenzyl group at position 1 and a 2-carboxy-2-methylpropyl group at position 2. It acts as an inhibitor of arachidonate 5-lipoxygenase.	2.69	3	0	aryl sulfide; indoles; monocarboxylic acid; monochlorobenzenes	antineoplastic agent; EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor; leukotriene antagonist
fosmidomycin monosodium salt [no description available]	2.25	1	0
ku 55933 2-morpholin-4-yl-6-thianthren-1-yl-pyran-4-one: specific inhibitor of the ataxia-telangiectasia mutated kinase ATM; structure in first source	2.31	1	0
quercetin [no description available]	2.42	2	0	7-hydroxyflavonol; pentahydroxyflavone	antibacterial agent; antineoplastic agent; antioxidant; Aurora kinase inhibitor; chelator; EC 1.10.99.2 [ribosyldihydronicotinamide dehydrogenase (quinone)] inhibitor; geroprotector; phytoestrogen; plant metabolite; protein kinase inhibitor; radical scavenger
dinoprostone prostaglandin E2 : Prostaglandin F2alpha in which the hydroxy group at position 9 has been oxidised to the corresponding ketone. Prostaglandin E2 is the most common and most biologically potent of mammalian prostaglandins.	3.71	10	0	prostaglandins E	human metabolite; mouse metabolite; oxytocic
dinoprost Dinoprost: A naturally occurring prostaglandin that has oxytocic, luteolytic, and abortifacient activities. Due to its vasocontractile properties, the compound has a variety of other biological actions.. prostaglandin F2alpha : A prostaglandins Falpha that is prosta-5,13-dien-1-oic acid substituted by hydroxy groups at positions 9, 11 and 15. It is a naturally occurring prostaglandin used to induce labor.	4.14	3	0	monocarboxylic acid; prostaglandins Falpha	human metabolite; mouse metabolite
apigenin Chamomile: Common name for several daisy-like plants (MATRICARIA; TRIPLEUROSPERMUM; ANTHEMIS; CHAMAEMELUM) native to Europe and Western Asia, now naturalized in the United States and Australia.	2.07	1	0	trihydroxyflavone	antineoplastic agent; metabolite
calcitriol dihydroxy-vitamin D3: as a major in vitro metabolite of 1alpha,25-dihydroxyvitamin D3, produced in primary cultures of neonatal human keratinocytes	2.44	2	0	D3 vitamins; hydroxycalciol; triol	antineoplastic agent; antipsoriatic; bone density conservation agent; calcium channel agonist; calcium channel modulator; hormone; human metabolite; immunomodulator; metabolite; mouse metabolite; nutraceutical
quercitrin [no description available]	2	1	0	alpha-L-rhamnoside; monosaccharide derivative; quercetin O-glycoside; tetrahydroxyflavone	antileishmanial agent; antioxidant; EC 1.1.1.184 [carbonyl reductase (NADPH)] inhibitor; EC 1.1.1.21 (aldehyde reductase) inhibitor; EC 1.14.18.1 (tyrosinase) inhibitor; plant metabolite
vitamin k semiquinone radical vitamin K semiquinone radical: found in active preparations of vitamin K-dependent carboxylase. vitamin K : Any member of a group of fat-soluble 2-methyl-1,4-napthoquinones that exhibit biological activity against vitamin K deficiency. Vitamin K is required for the synthesis of prothrombin and certain other blood coagulation factors.	2.42	2	0
beta carotene beta Carotene: A carotenoid that is a precursor of VITAMIN A. Beta carotene is administered to reduce the severity of photosensitivity reactions in patients with erythropoietic protoporphyria (PORPHYRIA, ERYTHROPOIETIC).. provitamin A : A provitamin that can be converted into vitamin A by enzymes from animal tissues.	3.41	7	0	carotenoid beta-end derivative; cyclic carotene	antioxidant; biological pigment; cofactor; ferroptosis inhibitor; human metabolite; mouse metabolite; plant metabolite; provitamin A
leukotriene b4 Leukotriene B4: The major metabolite in neutrophil polymorphonuclear leukocytes. It stimulates polymorphonuclear cell function (degranulation, formation of oxygen-centered free radicals, arachidonic acid release, and metabolism). (From Dictionary of Prostaglandins and Related Compounds, 1990). leukotriene B4 : A leukotriene composed of (6Z,8E,10E,14Z)-icosatetraenoic acid having (5S)- and (12R)-hydroxy substituents. It is a lipid mediator of inflammation that is generated from arachidonic acid via the 5-lipoxygenase pathway.	2.05	1	0	dihydroxy monocarboxylic acid; hydroxy polyunsaturated fatty acid; leukotriene; long-chain fatty acid	human metabolite; mouse metabolite; plant metabolite; vasoconstrictor agent
thromboxane a2 Thromboxane A2: An unstable intermediate between the prostaglandin endoperoxides and thromboxane B2. The compound has a bicyclic oxaneoxetane structure. It is a potent inducer of platelet aggregation and causes vasoconstriction. It is the principal component of rabbit aorta contracting substance (RCS).. thromboxane A2 : A thromboxane which is produced by activated platelets and has prothrombotic properties: it stimulates activation of new platelets as well as increases platelet aggregation.	2.06	1	0	epoxy monocarboxylic acid; thromboxanes A	mouse metabolite
rutin Hydroxyethylrutoside: Monohydroxyethyl derivative of rutin. Peripheral circulation stimulant used in treatment of venous disorders.	2.42	2	0	disaccharide derivative; quercetin O-glucoside; rutinoside; tetrahydroxyflavone	antioxidant; metabolite
11-dehydro-thromboxane b2 11-dehydro-thromboxane B2: structure given in first source. 11-dehydro-thromboxane B2 : A thromboxane obtained by formal oxidation of the hemiacetal hydroxy function of thromboxane B2.	3.84	2	0	thromboxane	human metabolite
cryptoxanthins Cryptoxanthins: Mono-hydroxylated xanthophylls formed from the hydroxylation of BETA-CAROTENE. Isomers include: beta-cryptoxanthin, alpha-cryptoxanthin, and zeinoxanthin. The alpha- and beta-cryptoxanthin are provitamin A precursors.. beta-cryptoxanthin : A carotenol that exhibits antioxidant activity. It has been isolated from fruits such as papaya and oranges.	2	1	0	carotenol	antioxidant; biomarker; plant metabolite; provitamin A
cucurbitacin b [no description available]	2.52	2	0	cucurbitacin; secondary alpha-hydroxy ketone; tertiary alpha-hydroxy ketone
esculetin esculetin: used in filters for absorption of ultraviolet light; structure. esculetin : A hydroxycoumarin that is umbelliferone in which the hydrogen at position 6 is substituted by a hydroxy group. It is used in filters for absorption of ultraviolet light.	2	1	0	hydroxycoumarin	antioxidant; plant metabolite; ultraviolet filter
ellagic acid [no description available]	3.08	5	0	catechols; cyclic ketone; lactone; organic heterotetracyclic compound; polyphenol	antioxidant; EC 1.14.18.1 (tyrosinase) inhibitor; EC 2.3.1.5 (arylamine N-acetyltransferase) inhibitor; EC 2.4.1.1 (glycogen phosphorylase) inhibitor; EC 2.5.1.18 (glutathione transferase) inhibitor; EC 2.7.1.127 (inositol-trisphosphate 3-kinase) inhibitor; EC 2.7.1.151 (inositol-polyphosphate multikinase) inhibitor; EC 2.7.4.6 (nucleoside-diphosphate kinase) inhibitor; EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor; EC 5.99.1.2 (DNA topoisomerase) inhibitor; EC 5.99.1.3 [DNA topoisomerase (ATP-hydrolysing)] inhibitor; food additive; fungal metabolite; geroprotector; plant metabolite; skin lightening agent
8-epi-prostaglandin f2alpha 8-epi-prostaglandin F2alpha: a potent preglomerular vasoconstrictor acting principally through thromboxane A2 receptor activation. 8-epi-prostaglandin F2alpha : An isoprostane that is prostaglandin F2alpha having inverted stereochemistry at the 8-position.	4.14	3	0	F2-isoprostane	biomarker; bronchoconstrictor agent; vasoconstrictor agent
13-hydroxy-9,11-octadecadienoic acid 13-hydroxy-9,11-octadecadienoic acid: chemorepellant factor which maintains blood vessel wall thromboresistance; RN given refers to unspecified stereoisomer	2.75	3	0	octadecadienoic acid
thromboxane b2 Thromboxane B2: A stable, physiologically active compound formed in vivo from the prostaglandin endoperoxides. It is important in the platelet-release reaction (release of ADP and serotonin).. thromboxane B2 : A member of the class of thromboxanes B that is (5Z,13E)-thromboxa-5,13-dien-1-oic acid substituted by hydroxy groups at positions 9, 11 and 15.	3.84	2	0	thromboxanes B	human metabolite; mouse metabolite
2,3-dinor-thromboxane b2 [no description available]	3.84	2	0	thromboxane
sarcophytol a sarcophytol A: structure given in first source; isolated from a soft coral Sarcophyton glaucum	2	1	0	cembrane diterpenoid
sirolimus Sirolimus: A macrolide compound obtained from Streptomyces hygroscopicus that acts by selectively blocking the transcriptional activation of cytokines thereby inhibiting cytokine production. It is bioactive only when bound to IMMUNOPHILINS. Sirolimus is a potent immunosuppressant and possesses both antifungal and antineoplastic properties.. sirolimus : A macrolide lactam isolated from Streptomyces hygroscopicus consisting of a 29-membered ring containing 4 trans double bonds, three of which are conjugated. It is an antibiotic, immunosupressive and antineoplastic agent.	2.74	3	0	antibiotic antifungal drug; cyclic acetal; cyclic ketone; ether; macrolide lactam; organic heterotricyclic compound; secondary alcohol	antibacterial drug; anticoronaviral agent; antineoplastic agent; bacterial metabolite; geroprotector; immunosuppressive agent; mTOR inhibitor
11-dehydrocorticosterone 11-dehydrocorticosterone : An 11-oxo steroid that is corticosterone in which the hydroxy substituent at the 11beta position has been oxidised to give the corresponding ketone.	1.99	1	0	11-oxo steroid; 20-oxo steroid; 21-hydroxy steroid; 3-oxo-Delta(4) steroid; corticosteroid; primary alpha-hydroxy ketone	human metabolite; mouse metabolite
sq 29548 SQ 29548: SQ-26538 is the ((1S-1alpha,2beta(5Z),3beta(1E,3R*),4alpha))-isomer; thromboxane A2 antagonist; thromboxane receptor antagonist	2.06	1	0
lead Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb.	2.03	1	0	carbon group element atom; elemental lead; metal atom	neurotoxin
15-hydroxy-5,8,11,13-eicosatetraenoic acid 15-hydroxy-5,8,11,13-eicosatetraenoic acid: potent & selective inhibitor of platelet lipoxygenase; RN given refers to cpd without isomeric designation	2.75	3	0
15-hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic acid 15-Hydroxy-11 alpha,9 alpha-(epoxymethano)prosta-5,13-dienoic Acid: A stable prostaglandin endoperoxide analog which serves as a thromboxane mimetic. Its actions include mimicking the hydro-osmotic effect of VASOPRESSIN and activation of TYPE C PHOSPHOLIPASES. (From J Pharmacol Exp Ther 1983;224(1): 108-117; Biochem J 1984;222(1):103-110)	2.06	1	0
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)	2.46	2	0	metalloid atom; pnictogen	micronutrient
beryllium Beryllium: An element with the atomic symbol Be, atomic number 4, and atomic weight 9.01218. Short exposure to this element can lead to a type of poisoning known as BERYLLIOSIS.. beryllium atom : Alkaline earth metal atom with atomic number 4.	2.01	1	0	alkaline earth metal atom; elemental beryllium; metal allergen	adjuvant; carcinogenic agent; epitope
cysteine Cysteine: A thiol-containing non-essential amino acid that is oxidized to form CYSTINE.. L-cysteinium : The L-enantiomer of cysteinium.. cysteine : A sulfur-containing amino acid that is propanoic acid with an amino group at position 2 and a sulfanyl group at position 3.	2.4	2	0	cysteinium	fundamental metabolite
artepillin c artepillin C: RN refers to (E)-isomer	2.01	1	0
sulindac sulfone sulindac sulfone: inhibits K-ras-dependent cyclooxygenase-2; sulfated analog of indomethacin;; CP248 is an antineoplastic agent that fosters microtubule depolymerization; structure in first source. sulindac sulfone : A sulfone metabolite of sulindac that inhibits cell growth by inducing apoptosis independently of cyclooxygenase inhibition. It inhibits the development and induces regression of premalignant adenomatous polyps. Lipoxygenase and Cox-2 inhibitor.	1.99	1	0	monocarboxylic acid; organofluorine compound; sulfone	apoptosis inducer; cyclooxygenase 2 inhibitor; EC 1.13.11.34 (arachidonate 5-lipoxygenase) inhibitor
ici 118551 ICI 118551: RN given refers to (R,R)-(+-)-isomer; structure in first source; ICI 111581 is hydrochloride of ICI 118551. ICI 118551 : An indane substituted at position 7 by a methyl group and at position 4 by a 3-(isopropylamino)-2-hydroxybutoxy group (the 2R,3S-diastereomer).	2.02	1	0	aromatic ether; indanes; secondary alcohol; secondary amino compound	beta-adrenergic antagonist
sinigrin sinigrin: glucosinate in mustard seeds etc.; RN given refers to parent cpd. sinigrin : An alkenylglucosinolic acid that consists of 1-thio-beta-D-glucopyranose having a 4-[(sulfooxy)imino]but-1-en-4-yl group attached to the anomeric sulfur.	2.37	2	0	alkenylglucosinolic acid
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.	2.92	4	0	chalcogen; nonmetal atom	micronutrient
selenocysteine Selenocysteine: A naturally occurring amino acid in both eukaryotic and prokaryotic organisms. It is found in tRNAs and in the catalytic site of some enzymes. The genes for glutathione peroxidase and formate dehydrogenase contain the TGA codon, which codes for this amino acid.. selenocysteine : An alpha-amino acid that consists of alanine where one of the methyl hydrogens is substituted with a seleno group.	2.02	1	0
(3S,5S,6E)-7-[3-(4-fluorophenyl)-1-(propan-2-yl)-1H-indol-2-yl]-3,5-dihydroxyhept-6-enoic acid Fluvastatin: An indole-heptanoic acid derivative that inhibits HMG COA REDUCTASE and is used to treat HYPERCHOLESTEROLEMIA. In contrast to other statins, it does not appear to interact with other drugs that inhibit CYP3A4.. (3S,5S,6E)-7-[3-(4-fluorophenyl)-1-(propan-2-yl)-1H-indol-2-yl]-3,5-dihydroxyhept-6-enoic acid : A (6E)-7-[3-(4-fluorophenyl)-1-(propan-2-yl)-1H-indol-2-yl]-3,5-dihydroxyhept-6-enoic acid diastereoisomer in which both chiral centres have S configuration.. fluvastatin : A racemate comprising equimolar amounts of (3R,5S)- and (3S,5R)-fluvastatin. An HMG-CoA reductase inhibitor, it is used (often as the corresponding sodium salt) to reduce triglycerides and LDL-cholesterol, and increase HDL-chloesterol, in the treatment of hyperlipidaemia.	2.21	1	0	(6E)-7-[3-(4-fluorophenyl)-1-(propan-2-yl)-1H-indol-2-yl]-3,5-dihydroxyhept-6-enoic acid
kyn 54 KYN 54: structure given in first source; a novel synthesized retinoid; potential chemopreventive agent for intestinal neoplasm	2	1	0
beta-escin Escin: Pentacyclic triterpene saponins, biosynthesized from protoaescigenin and barringtogenol, occurring in the seeds of AESCULUS. It inhibits edema formation and decreases vascular fragility.	2.08	1	0	triterpenoid saponin
beta-escin [no description available]	2.03	1	0
s-nitroso-n-acetylpenicillamine S-Nitroso-N-Acetylpenicillamine: A sulfur-containing alkyl thionitrite that is one of the NITRIC OXIDE DONORS.	2.04	1	0	nitroso compound; nitrosothio compound	nitric oxide donor; vasodilator agent
nitrofurantoin Nitrofurantoin: A urinary anti-infective agent effective against most gram-positive and gram-negative organisms. Although sulfonamides and antibiotics are usually the agents of choice for urinary tract infections, nitrofurantoin is widely used for prophylaxis and long-term suppression.. nitrofurantoin : An imidazolidine-2,4-dione that is hydantoin substituted at position 1 by a [(5-nitro-2-furyl)methylene]amino group. An antibiotic that damages bacterial DNA.	3.09	1	0	imidazolidine-2,4-dione; nitrofuran antibiotic; organonitrogen heterocyclic antibiotic; organooxygen heterocyclic antibiotic	antibacterial drug; antiinfective agent; hepatotoxic agent
staurosporine staurosporinium : Conjugate acid of staurosporine.	2.74	3	0	ammonium ion derivative
benzamidoxime benzamidoxime: structure given in first source. benzamidoxime : A member of the class of amidoximes obtained by formal condensation of the carbonyl group of benzamide with hydroxylamine.	2.25	1	0	amidoxime	bacterial metabolite; genotoxin; mammalian metabolite
guanoxabenz [no description available]	2.25	1	0
kb r7943 2-(2-(4-(4-nitrobenzyloxy)phenyl)ethyl)isothiourea methanesulfonate: inhibits the reverse mode of Na+/Ca++ exchange in cells expressing NCX1; structure in first source	2.13	1	0
sincalide Sincalide: An octapeptide hormone present in the intestine and brain. When secreted from the gastric mucosa, it stimulates the release of bile from the gallbladder and digestive enzymes from the pancreas.	2.07	1	0	oligopeptide
3,5-dimethyl-2-(3-pyridyl)thiazolidin-4-one 3,5-dimethyl-2-(3-pyridyl)thiazolidin-4-one: structure given in first source; SM-12502 is the (+) enantiomer of SM-10661; PAF antagonist	3.13	1	0
upamostat [no description available]	2.25	1	0
sc 236 4-(5-(4-chlorophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl)benzenesulfonamide: SC58236 = SC236 re email from Harris, Ray	2	1	0
cp 31398 CP 31398: structure in first source	2.08	1	0
dihydrokavain dihydrokavain: inhibits binding of batrachotoxinin-A 20-alpha-benzoate to receptor site 2 of voltage-gated sodium channels	2.1	1	0	2-pyranones; aromatic ether
oxadiazoles Oxadiazoles: Compounds containing five-membered heteroaromatic rings containing two carbons, two nitrogens, and one oxygen atom which exist in various regioisomeric forms.	2.31	1	0
o-methylthymidine O-methylthymidine: RN given refers to (beta)-isomer	1.96	1	0
nad NAD(1-) : An anionic form of nicotinamide adenine dinucleotide arising from deprotonation of the two OH groups of the diphosphate moiety.	2.95	4	0	organophosphate oxoanion	cofactor; human metabolite; hydrogen acceptor; Saccharomyces cerevisiae metabolite
cytochrome c-t Cytochromes c: Cytochromes of the c type that are found in eukaryotic MITOCHONDRIA. They serve as redox intermediates that accept electrons from MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX III and transfer them to MITOCHONDRIAL ELECTRON TRANSPORT COMPLEX IV.	2.02	1	0
ceruletide Ceruletide: A specific decapeptide obtained from the skin of Hila caerulea, an Australian amphibian. Caerulein is similar in action and composition to CHOLECYSTOKININ. It stimulates gastric, biliary, and pancreatic secretion; and certain smooth muscle. It is used in paralytic ileus and as diagnostic aid in pancreatic malfunction.. ceruletide : A decapeptide comprising 5-oxoprolyl, glutamyl, aspartyl, O-sulfotyrosyl, threonyl, glycyl, tryptopyl, methionyl, aspartyl and phenylalaninamide residues in sequence. Found in the skins of certain Australian amphibians, it is an analogue of the gastrointestinal peptide hormone cholecystokinin and stimulates gastric, biliary, and pancreatic secretion. It is used in cases of paralysis of the intestine (paralytic ileus) and as a diagnostic aid in pancreatic malfunction.	2.07	1	0	oligopeptide	diagnostic agent; gastrointestinal drug
oligonucleotides [no description available]	2.03	1	0
gsk690693 [no description available]	2.31	1	0	1,2,5-oxadiazole; acetylenic compound; aromatic amine; aromatic ether; imidazopyridine; piperidines; primary amino compound; tertiary alcohol	antineoplastic agent; EC 2.7.11.1 (non-specific serine/threonine protein kinase) inhibitor
calpain Calpain: Cysteine proteinase found in many tissues. Hydrolyzes a variety of endogenous proteins including NEUROPEPTIDES; CYTOSKELETAL PROTEINS; proteins from SMOOTH MUSCLE; CARDIAC MUSCLE; liver; platelets; and erythrocytes. Two subclasses having high and low calcium sensitivity are known. Removes Z-discs and M-lines from myofibrils. Activates phosphorylase kinase and cyclic nucleotide-independent protein kinase. This enzyme was formerly listed as EC 3.4.22.4.	2.02	1	0
sodium nitrite Sodium Nitrite: Nitrous acid sodium salt. Used in many industrial processes, in meat curing, coloring, and preserving, and as a reagent in ANALYTICAL CHEMISTRY TECHNIQUES. It is used therapeutically as an antidote in cyanide poisoning. The compound is toxic and mutagenic and will react in vivo with secondary or tertiary amines thereby producing highly carcinogenic nitrosamines.. sodium nitrite : An inorganic sodium salt having nitrite as the counterion. Used as a food preservative and antidote to cyanide poisoning.	2.39	2	0	inorganic sodium salt; nitrite salt	antidote to cyanide poisoning; antihypertensive agent; antimicrobial food preservative; food antioxidant; poison
piperidines Piperidines: A family of hexahydropyridines.	2.92	1	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.	2.02	1	0
heme Heme: The color-furnishing portion of hemoglobin. It is found free in tissues and as the prosthetic group in many hemeproteins.. ferroheme : Any iron(II)--porphyrin coordination complex.. ferroheme b : Heme b in which the iron has oxidation state +2.. heme : A heme is any tetrapyrrolic chelate of iron.	2.41	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.	4.35	6	0	ascorbic acid; vitamin C	coenzyme; cofactor; flour treatment agent; food antioxidant; food colour retention agent; geroprotector; plant metabolite; skin lightening agent
piroxicam [no description available]	1.98	1	0	benzothiazine; monocarboxylic acid amide; pyridines	analgesic; antirheumatic drug; cyclooxygenase 1 inhibitor; EC 1.14.99.1 (prostaglandin-endoperoxide synthase) inhibitor; 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.	3.27	6	0	benzenes; hydroxycoumarin; methyl ketone
6-o-palmitoylascorbic acid [no description available]	2	1	0	fatty acid ester
epidermal growth factor Epidermal Growth Factor: A 6-kDa polypeptide growth factor initially discovered in mouse submaxillary glands. Human epidermal growth factor was originally isolated from urine based on its ability to inhibit gastric secretion and called urogastrone. Epidermal growth factor exerts a wide variety of biological effects including the promotion of proliferation and differentiation of mesenchymal and EPITHELIAL CELLS. It is synthesized as a transmembrane protein which can be cleaved to release a soluble active form.	2.01	1	0
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.	3.14	5	0
nitrophenols Nitrophenols: PHENOLS carrying nitro group substituents.	1.99	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.	2.92	1	0
aconitine Aconitine: A C19 norditerpenoid alkaloid (DITERPENES) from the root of ACONITUM; DELPHINIUM and larkspurs. It activates VOLTAGE-GATED SODIUM CHANNELS. It has been used to induce ARRHYTHMIAS in experimental animals and it has anti-inflammatory and anti-neuralgic properties.. aconitine : A diterpenoid that is 20-ethyl-3alpha,13,15alpha-trihydroxy-1alpha,6alpha,16beta-trimethoxy-4-(methoxymethyl)aconitane-8,14alpha-diol having acetate and benzoate groups at the 8- and 14-positions respectively.	2.07	1	0
transforming growth factor alpha Transforming Growth Factor alpha: An EPIDERMAL GROWTH FACTOR related protein that is found in a variety of tissues including EPITHELIUM, and maternal DECIDUA. It is synthesized as a transmembrane protein which can be cleaved to release a soluble active form which binds to the EGF RECEPTOR.	2.38	2	0
silybin Silybin: The major active component of silymarin flavonoids extracted from seeds of the MILK THISTLE, Silybum marianum; it is used in the treatment of HEPATITIS; LIVER CIRRHOSIS; and CHEMICAL AND DRUG INDUCED LIVER INJURY, and has antineoplastic activity; silybins A and B are diastereomers.	2.49	2	0
lactoferrin Lactoferrin: An iron-binding protein that was originally characterized as a milk protein. It is widely distributed in secretory fluids and is found in the neutrophilic granules of LEUKOCYTES. The N-terminal part of lactoferrin possesses a serine protease which functions to inactivate the TYPE III SECRETION SYSTEM used by bacteria to export virulence proteins for host cell invasion.	2.45	2	0
muramidase Muramidase: A basic enzyme that is present in saliva, tears, egg white, and many animal fluids. It functions as an antibacterial agent. The enzyme catalyzes the hydrolysis of 1,4-beta-linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrin. EC 3.2.1.17.	2.02	1	0
deoxyguanosine [no description available]	5.48	15	0	purine 2'-deoxyribonucleoside; purines 2'-deoxy-D-ribonucleoside	Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
guanine [no description available]	5.25	51	0	2-aminopurines; oxopurine; purine nucleobase	algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite
guanosine ribonucleoside : Any nucleoside where the sugar component is D-ribose.	2.02	1	0	guanosines; purines D-ribonucleoside	fundamental metabolite
3-methyladenine N3-methyladenine: structure in first source	2.1	1	0
7-methylguanine 7-methylguanine: RN given refers to unlabeled cpd; structure. 7-methylguanine : A methylguanine that is guanine substituted by a methyl group at position 7. It is a metabolite obtained during the methylation of DNA.. 2-imino-7-methyl-1,2,3,7-tetrahydro-6H-purin-6-one : A 7-methylguanine that is 1,2,3,7-tetrahydro-6H-purin-6-one substituted by an imino group at position 2 and a methyl group at position 7.. 2-amino-7-methyl-7H-purin-6-ol : A 7-methylguanine that is 7H-purine substituted by an amino group at position 2, a methyl group at position 7 and a hydroxy group at position 6.. 2-amino-7-methyl-1,7-dihydro-6H-purin-6-one : A 7-methylguanine that is 1,7-dihydro-6H-purin-6-one substituted by an amino group at position 2 and a methyl group at position 7.	4	14	0	7-methylguanine
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	2.67	3	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.	4.91	8	0	guanosines	biomarker
concanavalin a Concanavalin A: A MANNOSE/GLUCOSE binding lectin isolated from the jack bean (Canavalia ensiformis). It is a potent mitogen used to stimulate cell proliferation in lymphocytes, primarily T-lymphocyte, cultures.	1.99	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.	1.98	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.	4.79	3	0

Condition	Relationship Strength	Studies	Trials
Congenital Zika Syndrome [description not available]	2.25	1	0
Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases.	7.44	43	0
Zika Virus Infection A viral disease transmitted by the bite of AEDES mosquitoes infected with ZIKA VIRUS. Its mild DENGUE-like symptoms include fever, rash, headaches and ARTHRALGIA. The viral infection during pregnancy, in rare cases, is associated with congenital brain and ocular abnormalities, called Congenital Zika Syndrome, including MICROCEPHALY and may also lead to GUILLAIN-BARRE SYNDROME.	2.25	1	0
Carcinogenesis The origin, production or development of cancer through genotypic and phenotypic changes which upset the normal balance between cell proliferation and cell death. Carcinogenesis generally requires a constellation of steps, which may occur quickly or over a period of many years.	6.39	34	0
Cancer of Lung [description not available]	14.68	400	1
Lung Neoplasms Tumors or cancer of the LUNG.	14.68	400	1
Carcinoma, Non-Small Cell Lung [description not available]	4.21	16	0
Experimental Neoplasms [description not available]	7.41	44	0
Carcinoma, Non-Small-Cell Lung A heterogeneous aggregate of at least three distinct histological types of lung cancer, including SQUAMOUS CELL CARCINOMA; ADENOCARCINOMA; and LARGE CELL CARCINOMA. They are dealt with collectively because of their shared treatment strategy.	4.21	16	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.	7.01	72	0
Carcinoma, Epidermoid [description not available]	4.34	19	0
Cancer of Mouth [description not available]	5.22	19	0
Carcinoma, Squamous Cell A carcinoma derived from stratified SQUAMOUS EPITHELIAL CELLS. It may also occur in sites where glandular or columnar epithelium is normally present. (From Stedman, 25th ed)	4.34	19	0
Mouth Neoplasms Tumors or cancer of the MOUTH.	5.22	19	0
Lung Adenocarcinoma [description not available]	3.93	11	0
Adenocarcinoma of Lung A carcinoma originating in the lung and the most common lung cancer type in never-smokers. Malignant cells exhibit distinct features such as glandular epithelial, or tubular morphology. Mutations in KRAS, EGFR, BRAF, and ERBB2 genes are associated with this cancer.	3.93	11	0
Colorectal Cancer [description not available]	2.59	2	0
Colorectal Neoplasms Tumors or cancer of the COLON or the RECTUM or both. Risk factors for colorectal cancer include chronic ULCERATIVE COLITIS; FAMILIAL POLYPOSIS COLI; exposure to ASBESTOS; and irradiation of the CERVIX UTERI.	2.59	2	0
Disbacteriosis [description not available]	2.31	1	0
Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	5.51	26	0
Adenocarcinoma, Basal Cell [description not available]	6.37	60	0
Adenocarcinoma A malignant epithelial tumor with a glandular organization.	6.37	60	0
Adenoma, Basal Cell [description not available]	7.6	53	0
Adenoma A benign epithelial tumor with a glandular organization.	7.6	53	0
Bladder Cancer [description not available]	2.77	3	0
Urinary Bladder Neoplasms Tumors or cancer of the URINARY BLADDER.	2.77	3	0
Carcinoma, Anaplastic [description not available]	3.3	6	0
Cancer of Pancreas [description not available]	5.93	24	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.	3.3	6	0
Pancreatic Neoplasms Tumors or cancer of the PANCREAS. Depending on the types of ISLET CELLS present in the tumors, various hormones can be secreted: GLUCAGON from PANCREATIC ALPHA CELLS; INSULIN from PANCREATIC BETA CELLS; and SOMATOSTATIN from the SOMATOSTATIN-SECRETING CELLS. Most are malignant except the insulin-producing tumors (INSULINOMA).	5.93	24	0
Diabetes Mellitus, Adult-Onset [description not available]	3.12	1	0
Diabetes Mellitus, Type 2 A subclass of DIABETES MELLITUS that is not INSULIN-responsive or dependent (NIDDM). It is characterized initially by INSULIN RESISTANCE and HYPERINSULINEMIA; and eventually by GLUCOSE INTOLERANCE; HYPERGLYCEMIA; and overt diabetes. Type II diabetes mellitus is no longer considered a disease exclusively found in adults. Patients seldom develop KETOSIS but often exhibit OBESITY.	3.12	1	0
Carcinoma, Small Cell Lung [description not available]	2.78	3	0
Small Cell Lung Carcinoma A form of highly malignant lung cancer that is composed of small ovoid cells (SMALL CELL CARCINOMA).	2.78	3	0
Asthma, Bronchial [description not available]	3.38	2	0
Asthma A form of bronchial disorder with three distinct components: airway hyper-responsiveness (RESPIRATORY HYPERSENSITIVITY), airway INFLAMMATION, and intermittent AIRWAY OBSTRUCTION. It is characterized by spasmodic contraction of airway smooth muscle, WHEEZING, and dyspnea (DYSPNEA, PAROXYSMAL).	3.38	2	0
Acute Edematous Pancreatitis [description not available]	2.78	3	0
Pancreatitis INFLAMMATION of the PANCREAS. Pancreatitis is classified as acute unless there are computed tomographic or endoscopic retrograde cholangiopancreatographic findings of CHRONIC PANCREATITIS (International Symposium on Acute Pancreatitis, Atlanta, 1992). The two most common forms of acute pancreatitis are ALCOHOLIC PANCREATITIS and gallstone pancreatitis.	2.78	3	0
Abnormalities, Autosome [description not available]	3.8	11	0
Benign Neoplasms [description not available]	7.57	17	0
Chromosome-Defective Micronuclei [description not available]	3.26	6	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.	7.57	17	0
Breast Cancer [description not available]	3.87	11	0
Breast Neoplasms Tumors or cancer of the human BREAST.	3.87	11	0
Experimental Lung Inflammation Inflammation of any part, segment or lobe, of the lung parenchyma.	2.79	3	0
Pneumonia Infection of the lung often accompanied by inflammation.	2.79	3	0
Innate Inflammatory Response [description not available]	4.96	8	0
Disease, Pulmonary [description not available]	2.08	1	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.	4.96	8	0
Lung Diseases Pathological processes involving any part of the LUNG.	2.08	1	0
Disease Exacerbation [description not available]	4.13	15	0
Condition, Preneoplastic [description not available]	3.64	9	0
Precancerous Conditions Pathological conditions that tend eventually to become malignant.	3.64	9	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)	3.82	11	0
Hormone-Dependent Neoplasms [description not available]	2.08	1	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.	4.2	17	0
Neoplasms, Squamous Cell Neoplasms of the SQUAMOUS EPITHELIAL CELLS. The concept does not refer to neoplasms located in tissue composed of squamous elements.	2.08	1	0
Metaplasia A condition in which there is a change of one adult cell type to another similar adult cell type.	2.69	3	0
Diathesis [description not available]	3.63	9	0
Silicosis A form of pneumoconiosis resulting from inhalation of dust containing crystalline form of SILICON DIOXIDE, usually in the form of quartz. Amorphous silica is relatively nontoxic.	2.1	1	0
Alcohol Abuse [description not available]	2.73	3	0
Alcoholism A primary, chronic disease with genetic, psychosocial, and environmental factors influencing its development and manifestations. The disease is often progressive and fatal. It is characterized by impaired control over drinking, preoccupation with the drug alcohol, use of alcohol despite adverse consequences, and distortions in thinking, most notably denial. Each of these symptoms may be continuous or periodic. (Morse & Flavin for the Joint Commission of the National Council on Alcoholism and Drug Dependence and the American Society of Addiction Medicine to Study the Definition and Criteria for the Diagnosis of Alcoholism: in JAMA 1992;268:1012-4)	2.73	3	0
Cocarcinogenesis The combination of two or more different factors in the production of cancer.	3.61	9	0
Genetic Predisposition [description not available]	3.74	10	0
Cancer of Head [description not available]	2.97	4	0
Hypopharyngeal Cancer [description not available]	2.11	1	0
Cancer of the Tongue [description not available]	2.11	1	0
Invasiveness, Neoplasm [description not available]	3.13	5	0
Head and Neck Neoplasms Soft tissue tumors or cancer arising from the mucosal surfaces of the LIP; oral cavity; PHARYNX; LARYNX; and cervical esophagus. Other sites included are the NOSE and PARANASAL SINUSES; SALIVARY GLANDS; THYROID GLAND and PARATHYROID GLANDS; and MELANOMA and non-melanoma skin cancers of the head and neck. (from Holland et al., Cancer Medicine, 4th ed, p1651)	2.97	4	0
Hypopharyngeal Neoplasms Tumors or cancer of the HYPOPHARYNX.	2.11	1	0
Tongue Neoplasms Tumors or cancer of the TONGUE.	2.11	1	0
Genome Instability [description not available]	2.1	1	0
Binge Alcohol Consumption [description not available]	2.11	1	0
Insulin Sensitivity [description not available]	2.52	2	0
Alcoholic Liver Diseases [description not available]	2.11	1	0
Alcoholic Fatty Liver [description not available]	2.11	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.	2.52	2	0
Liver Diseases, Alcoholic Liver diseases associated with ALCOHOLISM. It usually refers to the coexistence of two or more subentities, i.e., ALCOHOLIC FATTY LIVER; ALCOHOLIC HEPATITIS; and ALCOHOLIC CIRRHOSIS.	2.11	1	0
Necrosis The death of cells in an organ or tissue due to disease, injury or failure of the blood supply.	2.41	2	0
Cancer of Esophagus [description not available]	3.39	7	0
Esophageal Neoplasms Tumors or cancer of the ESOPHAGUS.	3.39	7	0
Germinoblastoma [description not available]	2.71	3	0
Lymphoma A general term for various neoplastic diseases of the lymphoid tissue.	2.71	3	0
Metastase [description not available]	2.76	3	0
Neoplasm Metastasis The transfer of a neoplasm from one organ or part of the body to another remote from the primary site.	2.76	3	0
Nerve Degeneration Loss of functional activity and trophic degeneration of nerve axons and their terminal arborizations following the destruction of their cells of origin or interruption of their continuity with these cells. The pathology is characteristic of neurodegenerative diseases. Often the process of nerve degeneration is studied in research on neuroanatomical localization and correlation of the neurophysiology of neural pathways.	2.11	1	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.	2.11	1	0
Cancer of Larynx [description not available]	2.5	2	0
Laryngeal Neoplasms Cancers or tumors of the LARYNX or any of its parts: the GLOTTIS; EPIGLOTTIS; LARYNGEAL CARTILAGES; LARYNGEAL MUSCLES; and VOCAL CORDS.	2.5	2	0
Epithelial Neoplasms [description not available]	2.13	1	0
Esophageal Squamous Cell Carcinoma A carcinoma that originates usually from cells on the surface of the middle and lower third of the ESOPHAGUS. Tumor cells exhibit typical squamous morphology and form large polypoid lesions. Mutations in RNF6, LZTS1, TGFBR2, DEC1, and WWOX1 genes are associated with this cancer.	2.13	1	0
Cancer of Stomach [description not available]	3.79	11	0
Stomach Neoplasms Tumors or cancer of the STOMACH.	3.79	11	0
Calcification, Pathologic [description not available]	2.04	1	0
Calcinosis Pathologic deposition of calcium salts in tissues.	2.04	1	0
Kidney Diseases Pathological processes of the KIDNEY or its component tissues.	2.04	1	0
Cell Transformation, Viral An inheritable change in cells manifested by changes in cell division and growth and alterations in cell surface properties. It is induced by infection with a transforming virus.	2.05	1	0
Body Weight The mass or quantity of heaviness of an individual. It is expressed by units of pounds or kilograms.	5.36	22	0
Multiple Primary Neoplasms [description not available]	2.04	1	0
Alveolitis, Fibrosing [description not available]	2.05	1	0
Pulmonary Fibrosis A process in which normal lung tissues are progressively replaced by FIBROBLASTS and COLLAGEN causing an irreversible loss of the ability to transfer oxygen into the bloodstream via PULMONARY ALVEOLI. Patients show progressive DYSPNEA finally resulting in death.	2.05	1	0
Carcinoma, Ductal, Pancreatic [description not available]	2.73	3	0
Carcinoma, Pancreatic Ductal Carcinoma that arises from the PANCREATIC DUCTS. It accounts for the majority of cancers derived from the PANCREAS.	2.73	3	0
Delayed Effects, Prenatal Exposure [description not available]	2.91	4	0
Cancer of Colon [description not available]	3.12	5	0
Colonic Neoplasms Tumors or cancer of the COLON.	3.12	5	0
Smoking Cessation Discontinuing the habit of SMOKING.	9.8	13	5
Angiogenesis, Pathologic [description not available]	2.96	4	0
Atelectasis [description not available]	2.06	1	0
Carcinoma, Bronchial [description not available]	2.05	1	0
Carcinoma, Bronchogenic Malignant neoplasm arising from the epithelium of the BRONCHI. It represents a large group of epithelial lung malignancies which can be divided into two clinical groups: SMALL CELL LUNG CANCER and NON-SMALL-CELL LUNG CARCINOMA.	2.05	1	0
Carcinoma, Large Cell A tumor of undifferentiated (anaplastic) cells of large size. It is usually bronchogenic. (From Dorland, 27th ed)	2.05	1	0
Drug Withdrawal Symptoms [description not available]	4.37	1	1
Substance Withdrawal Syndrome Physiological and psychological symptoms associated with withdrawal from the use of a drug after prolonged administration or habituation. The concept includes withdrawal from smoking or drinking, as well as withdrawal from an administered drug.	4.37	1	1
Airflow Obstruction, Chronic [description not available]	3.39	2	0
Emphysema A pathological accumulation of air in tissues or organs.	2.98	1	0
Pulmonary Disease, Chronic Obstructive A disease of chronic diffuse irreversible airflow obstruction. Subcategories of COPD include CHRONIC BRONCHITIS and PULMONARY EMPHYSEMA.	3.39	2	0
Cancer of the Urinary Tract [description not available]	2.77	3	0
Carcinoma, Squamous Cell of Head and Neck [description not available]	2.06	1	0
Squamous Cell Carcinoma of Head and Neck The most common type of head and neck carcinoma that originates from cells on the surface of the NASAL CAVITY; MOUTH; PARANASAL SINUSES, SALIVARY GLANDS, and LARYNX. Mutations in TNFRSF10B, PTEN, and ING1 genes are associated with this cancer.	2.06	1	0
Haemophilus Infections Infections with bacteria of the genus HAEMOPHILUS.	2.07	1	0
Anasarca [description not available]	2.07	1	0
Edema Abnormal fluid accumulation in TISSUES or body cavities. Most cases of edema are present under the SKIN in SUBCUTANEOUS TISSUE.	2.07	1	0
Cholera Infantum [description not available]	3	1	0
Cancer of Gastrointestinal Tract [description not available]	3	1	0
Gastroduodenal Ulcer [description not available]	3	1	0
Gastric Ulcer [description not available]	3	1	0
Peptic Ulcer Ulcer that occurs in the regions of the GASTROINTESTINAL TRACT which come into contact with GASTRIC JUICE containing PEPSIN and GASTRIC ACID. It occurs when there are defects in the MUCOSA barrier. The common forms of peptic ulcers are associated with HELICOBACTER PYLORI and the consumption of nonsteroidal anti-inflammatory drugs (NSAIDS).	3	1	0
Stomach Ulcer Ulceration of the GASTRIC MUCOSA due to contact with GASTRIC JUICE. It is often associated with HELICOBACTER PYLORI infection or consumption of nonsteroidal anti-inflammatory drugs (NSAIDS).	3	1	0
Carcinoma, Transitional Cell A malignant neoplasm derived from TRANSITIONAL EPITHELIAL CELLS, occurring chiefly in the URINARY BLADDER; URETERS; or RENAL PELVIS.	2.07	1	0
Cancer, Radiation-Induced [description not available]	2.46	2	0
Carcinoma, Oat Cell [description not available]	4.18	6	0
Carcinoma, Small Cell An anaplastic, highly malignant, and usually bronchogenic carcinoma composed of small ovoid cells with scanty neoplasm. It is characterized by a dominant, deeply basophilic nucleus, and absent or indistinct nucleoli. (From Stedman, 25th ed; Holland et al., Cancer Medicine, 3d ed, p1286-7)	4.18	6	0
Neoplasms, Otorhinolaryngologic [description not available]	2.01	1	0
Adenocarcinoma, Alveolar [description not available]	2.42	2	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)	2.42	2	0
Fibroma, Shope [description not available]	2.01	1	0
Nicotine Addiction [description not available]	2.71	3	0
Tobacco Use Disorder Tobacco used to the detriment of a person's health or social functioning. Tobacco dependence is included.	2.71	3	0
Chronic Pancreatitis [description not available]	2.02	1	0
Pancreatic Insufficiency [description not available]	2.02	1	0
Alcohol Drinking Behaviors associated with the ingesting of ALCOHOLIC BEVERAGES, including social drinking.	2.7	3	0
Exocrine Pancreatic Insufficiency A malabsorption condition resulting from greater than 10% reduction in the secretion of pancreatic digestive enzymes (LIPASE; PROTEASES; and AMYLASE) by the EXOCRINE PANCREAS into the DUODENUM. This condition is often associated with CYSTIC FIBROSIS and with chronic PANCREATITIS.	2.02	1	0
Pancreatitis, Chronic INFLAMMATION of the PANCREAS that is characterized by recurring or persistent ABDOMINAL PAIN with or without STEATORRHEA or DIABETES MELLITUS. It is characterized by the irregular destruction of the pancreatic parenchyma which may be focal, segmental, or diffuse.	2.02	1	0
Neoplasms, Bronchial [description not available]	2.02	1	0
Bronchial Neoplasms Tumors or cancer of the BRONCHI.	2.02	1	0
Complications, Pregnancy [description not available]	2.41	2	0
Cancer, Second Primary [description not available]	2.03	1	0
Kaposi Disease [description not available]	2.04	1	0
Xeroderma Pigmentosum A rare, pigmentary, and atrophic autosomal recessive disease. It is manifested as an extreme photosensitivity to ULTRAVIOLET RAYS as the result of a deficiency in the enzyme that permits excisional repair of ultraviolet-damaged DNA.	2.04	1	0
Cancer of Pharynx [description not available]	1.96	1	0
Pharyngeal Neoplasms Tumors or cancer of the PHARYNX.	1.96	1	0
Cancer of Nose [description not available]	5.08	17	0
Tracheal Neoplasms New abnormal growth of tissue in the TRACHEA.	1.96	1	0
Respiratory Tract Neoplasms New abnormal growth of tissue in the RESPIRATORY SYSTEM.	2.88	4	0
Cancer of Liver [description not available]	3.58	9	0
Liver Neoplasms Tumors or cancer of the LIVER.	3.58	9	0
Papilloma, Squamous Cell [description not available]	2.39	2	0
Papilloma A circumscribed benign epithelial tumor projecting from the surrounding surface; more precisely, a benign epithelial neoplasm consisting of villous or arborescent outgrowths of fibrovascular stroma covered by neoplastic cells. (Stedman, 25th ed)	2.39	2	0
Keratoderma Blennorrhagicum [description not available]	1.98	1	0
Keratosis, Oral [description not available]	2.39	2	0
Keratosis Any horny growth such as a wart or callus.	1.98	1	0
Leukoplakia, Oral A white patch seen on the oral mucosa. It is considered a premalignant condition and is often tobacco-induced. When evidence of Epstein-Barr virus is present, the condition is called hairy leukoplakia (LEUKOPLAKIA, HAIRY).	2.39	2	0
Experimental Hepatoma [description not available]	3.59	9	0
Mouth Diseases Diseases involving the MOUTH.	1.98	1	0
Leukoedema, Oral A disorder of the buccal mucosa resembling early leukoplakia, characterized by the presence of filmy opalescence of the mucosa in the early stages to a whitish gray cast with a coarsely wrinkled surface in the later stages, associated with intracellular edema of the spinous or malpighian layer. (Dorland, 27th ed)	1.98	1	0
Island Cell Tumor [description not available]	1.98	1	0
Adenoma, Islet Cell A benign tumor of the pancreatic ISLET CELLS. Usually it involves the INSULIN-producing PANCREATIC BETA CELLS, as in INSULINOMA, resulting in HYPERINSULINISM.	1.98	1	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.	2.4	2	0
Experimental Leukemia [description not available]	1.99	1	0
Interstitial Cell Tumor [description not available]	1.99	1	0
Cancer of Testis [description not available]	1.99	1	0
Testicular Neoplasms Tumors or cancer of the TESTIS. Germ cell tumors (GERMINOMA) of the testis constitute 95% of all testicular neoplasms.	1.99	1	0
Urinary Tract Infections Inflammatory responses of the epithelium of the URINARY TRACT to microbial invasions. They are often bacterial infections with associated BACTERIURIA and PYURIA.	1.99	1	0
Cancer of Cervix [description not available]	2.91	1	0
Uterine Cervical Neoplasms Tumors or cancer of the UTERINE CERVIX.	2.91	1	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.	4.06	3	0
Hyperoxia An abnormal increase in the amount of oxygen in the tissues and organs.	2.91	1	0
Starvation Lengthy and continuous deprivation of food. (Stedman, 25th ed)	1.99	1	0
Chemical Dependence [description not available]	2.91	1	0
Substance-Related Disorders Disorders related to substance use or abuse.	2.91	1	0
Carcinoma, Intraepithelial [description not available]	1.99	1	0
Carcinoma in Situ A lesion with cytological characteristics associated with invasive carcinoma but the tumor cells are confined to the epithelium of origin, without invasion of the basement membrane.	1.99	1	0
Malignant Melanoma [description not available]	2	1	0
Melanoma A malignant neoplasm derived from cells that are capable of forming melanin, which may occur in the skin of any part of the body, in the eye, or, rarely, in the mucous membranes of the genitalia, anus, oral cavity, or other sites. It occurs mostly in adults and may originate de novo or from a pigmented nevus or malignant lentigo. Melanomas frequently metastasize widely, and the regional lymph nodes, liver, lungs, and brain are likely to be involved. The incidence of malignant skin melanomas is rising rapidly in all parts of the world. (Stedman, 25th ed; from Rook et al., Textbook of Dermatology, 4th ed, p2445)	2	1	0
Aging The gradual irreversible changes in structure and function of an organism that occur as a result of the passage of time.	1.99	1	0
Anal Cancer [description not available]	2	1	0
Cancer of the Vulva [description not available]	2	1	0
Anus Neoplasms Tumors or cancer of the ANAL CANAL.	2	1	0
Vulvar Neoplasms Tumors or cancer of the VULVA.	2	1	0
Carcinoma, Lewis Lung A carcinoma discovered by Dr. Margaret R. Lewis of the Wistar Institute in 1951. This tumor originated spontaneously as a carcinoma of the lung of a C57BL mouse. The tumor does not appear to be grossly hemorrhagic and the majority of the tumor tissue is a semifirm homogeneous mass. (From Cancer Chemother Rep 2 1972 Nov;(3)1:325) It is also called 3LL and LLC and is used as a transplantable malignancy.	2	1	0
Embryopathies [description not available]	2	1	0
Hepatocellular Carcinoma [description not available]	1.98	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.	1.98	1	0
Neoplasms, Nerve Tissue Neoplasms composed of nerve tissue. This concept does not refer to neoplasms located in the nervous system or its component nerves.	2.89	1	0
Cancer of Skin [description not available]	1.97	1	0
Skin Neoplasms Tumors or cancer of the SKIN.	1.97	1	0
Deficiency, Vitamin A [description not available]	2.38	2	0
Vitamin A Deficiency A nutritional condition produced by a deficiency of VITAMIN A in the diet, characterized by NIGHT BLINDNESS and other ocular manifestations such as dryness of the conjunctiva and later of the cornea (XEROPHTHALMIA). Vitamin A deficiency is a very common problem worldwide, particularly in developing countries as a consequence of famine or shortages of vitamin A-rich foods. In the United States it is found among the urban poor, the elderly, alcoholics, and patients with malabsorption. (From Cecil Textbook of Medicine, 19th ed, p1179)	2.38	2	0
Cancer of Nasopharynx [description not available]	1.97	1	0
Nasopharyngeal Neoplasms Tumors or cancer of the NASOPHARYNX.	1.97	1	0
Herpes Simplex Virus Infection [description not available]	1.96	1	0
Herpes Simplex A group of acute infections caused by herpes simplex virus type 1 or type 2 that is characterized by the development of one or more small fluid-filled vesicles with a raised erythematous base on the skin or mucous membrane. It occurs as a primary infection or recurs due to a reactivation of a latent infection. (Dorland, 27th ed.)	1.96	1	0

4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone

Description

Cross-References

Synonyms (71)

Research Excerpts

Toxicity

Pharmacokinetics

Compound-Compound Interactions

Bioavailability

Dosage Studied

Drug Classes (2)

Protein Targets (1)

Potency Measurements

Bioassays (9)

Research

Studies (956)

Study Types

4-(n-methyl-n-nitrosamino)-1-(3-pyridyl)-1-butanone

Description

Cross-References

Synonyms (71)

Research Excerpts

Toxicity

Pharmacokinetics

Compound-Compound Interactions

Bioavailability

Dosage Studied

Drug Classes (2)

Protein Targets (1)

Potency Measurements

Bioassays (9)

Research

Studies (956)

Study Types

Related Drugs (381)

Related Conditions (203)