benzene
[no description available] | 2.02 | 1 | 0 | aromatic annulene;
benzenes;
volatile organic compound | carcinogenic agent;
environmental contaminant;
non-polar solvent |
methane
Methane: The simplest saturated hydrocarbon. It is a colorless, flammable gas, slightly soluble in water. It is one of the chief constituents of natural gas and is formed in the decomposition of organic matter. (Grant & Hackh's Chemical Dictionary, 5th ed). methane : A one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms. It is a colourless, odourless, non-toxic but flammable gas (b.p. -161degreeC). | 2.51 | 2 | 0 | alkane;
gas molecular entity;
mononuclear parent hydride;
one-carbon compound | bacterial metabolite;
fossil fuel;
greenhouse gas |
formaldehyde
paraform: polymerized formaldehyde; RN given refers to parent cpd; used in root canal therapy | 2.21 | 1 | 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 |
methanol
Methanol: A colorless, flammable liquid used in the manufacture of FORMALDEHYDE and ACETIC ACID, in chemical synthesis, antifreeze, and as a solvent. Ingestion of methanol is toxic and may cause blindness.. primary alcohol : A primary alcohol is a compound in which a hydroxy group, -OH, is attached to a saturated carbon atom which has either three hydrogen atoms attached to it or only one other carbon atom and two hydrogen atoms attached to it.. methanol : The primary alcohol that is the simplest aliphatic alcohol, comprising a methyl and an alcohol group. | 2.21 | 1 | 0 | alkyl alcohol;
one-carbon compound;
primary alcohol;
volatile organic compound | amphiprotic solvent;
Escherichia coli metabolite;
fuel;
human metabolite;
mouse metabolite;
Mycoplasma genitalium metabolite |
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) | 2.17 | 1 | 0 | monovalent inorganic anion;
nitrogen oxoanion;
reactive nitrogen species | human metabolite |
nitrous oxide
Nitrous Oxide: Nitrogen oxide (N2O). A colorless, odorless gas that is used as an anesthetic and analgesic. High concentrations cause a narcotic effect and may replace oxygen, causing death by asphyxia. It is also used as a food aerosol in the preparation of whipping cream.. dinitrogen oxide : A nitrogen oxide consisting of linear unsymmetrical molecules with formula N2O. While it is the most used gaseous anaesthetic in the world, its major commercial use, due to its solubility under pressure in vegetable fats combined with its non-toxicity in low concentrations, is as an aerosol spray propellant and aerating agent for canisters of 'whipped' cream. | 2.02 | 1 | 0 | gas molecular entity;
nitrogen oxide | analgesic;
bacterial metabolite;
food packaging gas;
food propellant;
general anaesthetic;
greenhouse gas;
inhalation anaesthetic;
NMDA receptor antagonist;
raising agent;
refrigerant;
vasodilator agent |
phthalic acid
phthalic acid: RN given refers to parent cpd; structure in Merck Index, 9th ed, #7178. phthalic acid : A benzenedicarboxylic acid cosisting of two carboxy groups at ortho positions. | 2.44 | 2 | 0 | benzenedicarboxylic acid | human xenobiotic metabolite |
ether
Ether: A mobile, very volatile, highly flammable liquid used as an inhalation anesthetic and as a solvent for waxes, fats, oils, perfumes, alkaloids, and gums. It is mildly irritating to skin and mucous membranes.. ether : An organooxygen compound with formula ROR, where R is not hydrogen.. diethyl ether : An ether in which the oxygen atom is linked to two ethyl groups. | 2.01 | 1 | 0 | ether;
volatile organic compound | inhalation anaesthetic;
non-polar solvent;
refrigerant |
serine
Serine: A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from GLYCINE or THREONINE. It is involved in the biosynthesis of PURINES; PYRIMIDINES; and other amino acids.. serine : An alpha-amino acid that is alanine substituted at position 3 by a hydroxy group. | 2.21 | 1 | 0 | L-alpha-amino acid;
proteinogenic amino acid;
serine family amino acid;
serine zwitterion;
serine | algal metabolite;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
Saccharomyces cerevisiae metabolite |
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. | 2.77 | 3 | 0 | benzenes;
piperidines | anaesthetic;
neurotoxin;
NMDA receptor antagonist;
psychotropic drug |
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. | 3.55 | 2 | 0 | alkadiene;
hemiterpene;
volatile organic compound | plant metabolite |
xylitol
xylooligosaccharide: structure in first source. pentitol : An alditol obtained by reduction of any pentose.. xylooligosaccharide : An oligosaccharide comprised of xylose residues. | 2.01 | 1 | 0 | | |
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. | 3.55 | 2 | 0 | alkane;
volatile organic compound | non-polar solvent;
refrigerant |
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. | 2.05 | 1 | 0 | catechin | antioxidant;
plant metabolite |
picene
picene: structure given in first source. picene : An ortho-fused polycyclic arene consisting of five fused benzene rings. It is obtained during the distillation of petroleum. | 2.08 | 1 | 0 | ortho-fused polycyclic arene | |
cyclopentane
Cyclopentanes: A group of alicyclic hydrocarbons with the general formula R-C5H9.. cyclopentanes : Cyclopentane and its derivatives formed by substitution. | 7.45 | 2 | 0 | cycloalkane;
cyclopentanes;
volatile organic compound | non-polar solvent |
oleanolic acid
[no description available] | 2.45 | 2 | 0 | hydroxy monocarboxylic acid;
pentacyclic triterpenoid | plant metabolite |
phytane
[no description available] | 2.02 | 1 | 0 | diterpene | |
pristane
pristane: structure. pristane : A norterpene that is an acyclic saturated hydrocarbon derived from phytane by loss of its C-16 terminal methyl group. | 2.44 | 2 | 0 | long-chain alkane;
norterpene | biomarker;
immunological adjuvant |
1-nitropyrene
[no description available] | 2.5 | 2 | 0 | nitroarene | carcinogenic agent |
manganese
Manganese: A trace element with atomic symbol Mn, atomic number 25, and atomic weight 54.94. It is concentrated in cell mitochondria, mostly in the pituitary gland, liver, pancreas, kidney, and bone, influences the synthesis of mucopolysaccharides, stimulates hepatic synthesis of cholesterol and fatty acids, and is a cofactor in many enzymes, including arginase and alkaline phosphatase in the liver. (From AMA Drug Evaluations Annual 1992, p2035). manganese(4+) : A manganese cation that is monoatomic and has a formal charge of +4. | 2.02 | 1 | 0 | elemental manganese;
manganese group element atom | Escherichia coli metabolite;
micronutrient |
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. | 1.99 | 1 | 0 | cadmium molecular entity;
zinc group element atom | |
6-nitrochrysene
6-nitrochrysene: RN given refers to cpd with locant for nitro group in position 6 | 2.5 | 2 | 0 | carbopolycyclic compound | |
acetylglucosamine
Acetylglucosamine: The N-acetyl derivative of glucosamine.. N-acetyl-beta-D-glucosamine : An N-acetyl-D-glucosamine having beta-configuration at the anomeric centre. | 2.01 | 1 | 0 | N-acetyl-D-glucosamine | epitope |
deuterium
Deuterium: The stable isotope of hydrogen. It has one neutron and one proton in the nucleus. | 2.01 | 1 | 0 | dihydrogen | |
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. | 1.96 | 1 | 0 | benzenes;
phenyl acetates | |
isocoumarins
Isocoumarins: Compounds that differ from COUMARINS in having the positions of the ring and ketone oxygens reversed so the keto oxygen is at the 1-position of the molecule.. isocoumarin : The simplest member of the class of isocoumarins that is 1H-isochromene which is substituted by an oxo group at position 1. | 2.06 | 1 | 0 | isocoumarins | |
delphinidin
Paraffin: A mixture of solid hydrocarbons obtained from petroleum. It has a wide range of uses including as a stiffening agent in ointments, as a lubricant, and as a topical anti-inflammatory. It is also commonly used as an embedding material in histology.. delphinidin chloride : An anthocyanidin chloride that has delphinidin as the cationic counterpart. | 2.02 | 1 | 0 | anthocyanidin chloride | |
diploptene
diploptene: biosynthesized in a cell-free system from Acetobacter pasteurianum in the presence of squalene. hop-22(29)-ene : A triterpene consisting of hopane having a C=C double bond at the 22(29)-position. | 2.48 | 2 | 0 | triterpene | |
ribulose
ribulose: 5-carbon keto sugar; minor descriptor (75-85); on-line & Index Medicus search PENTOSES (75-85); RN given refers to (erythro)-isomer | 2.21 | 1 | 0 | ribulose | Escherichia coli metabolite;
human metabolite |
hydroxyl radical
Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent. | 7.45 | 2 | 0 | oxygen hydride;
oxygen radical;
reactive oxygen species | |
diplopterol
diplopterol: biosyntheside from squalene in a cell-free system for Acetobacter pasteurianum; RN given refers to cpd without isomeric designation | 2.49 | 2 | 0 | hopanoid;
pentacyclic triterpenoid;
tertiary alcohol | plant metabolite |
tetrahymanol
tetrahymanol: minor descriptor (75-82); online & Index Medicus search TRITERPENES (75-82). tetrahymanol : A pentacyclic triterpenoid having a 3beta- (21alpha-) hydroxy-substituted gammacerane structure. | 2.1 | 1 | 0 | pentacyclic triterpenoid | |
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. | 2.03 | 1 | 0 | | |
erythritol
[no description available] | 3.14 | 1 | 0 | butane-1,2,3,4-tetrol | antioxidant;
human metabolite;
plant metabolite |
epiafzelechin
epiafzelechin: antioxidant; 3'-deoxy form of epicatechin; structure in first source. (-)-epiafzelechin : A catechin derivative having (2R,3R)-configuration. | 2.05 | 1 | 0 | catechin | 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. | 1.96 | 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 |
glycosides
[no description available] | 3.43 | 7 | 0 | | |
1,6-anhydro-beta-glucopyranose
1,6-anhydro-beta-glucopyranose: RN given refers to (beta-D)-isomer. levoglucosan : A anhydrohexose that is the 1,6-anhydro-derivative of beta-D-glucopyranose. | 2.08 | 1 | 0 | anhydrohexose | Arabidopsis thaliana metabolite;
biomarker;
human metabolite |
lithium
Lithium: An element in the alkali metals family. It has the atomic symbol Li, atomic number 3, and atomic weight [6.938; 6.997]. Salts of lithium are used in treating BIPOLAR DISORDER. | 2.03 | 1 | 0 | alkali metal atom | |
ubiquinone q2
Ubiquinone Q2: interacts with iron atom to form acceptor quinone complex; RN given refers to cpd with unspecified isomeric designation | 2.1 | 1 | 0 | ubiquinones | |
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. | 2.08 | 1 | 0 | carotenoid beta-end derivative;
cyclic carotene | antioxidant;
biological pigment;
cofactor;
ferroptosis inhibitor;
human metabolite;
mouse metabolite;
plant metabolite;
provitamin A |
rutin
Hydroxyethylrutoside: Monohydroxyethyl derivative of rutin. Peripheral circulation stimulant used in treatment of venous disorders. | 2.05 | 1 | 0 | disaccharide derivative;
quercetin O-glucoside;
rutinoside;
tetrahydroxyflavone | antioxidant;
metabolite |
rhodoxanthin
rhodoxanthin: RN given refers to (all-trans)-isomer | 2.08 | 1 | 0 | xanthophyll | |
menaquinone 6
menaquinone 6: RN given refers to (all-E)-isomer | 2.5 | 2 | 0 | | |
menaquinone 7
menaquinone-7 : A menaquinone whose side-chain contains seven isoprene units in an all-trans-configutation. | 2.1 | 1 | 0 | menaquinone | bone density conservation agent;
cofactor;
Escherichia coli metabolite;
human blood serum metabolite;
Mycoplasma genitalium metabolite |
lead
Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.2, symbol Pb. | 1.99 | 1 | 0 | carbon group element atom;
elemental lead;
metal atom | neurotoxin |
sulfur
Sulfur: An element that is a member of the chalcogen family. It has an atomic symbol S, atomic number 16, and atomic weight [32.059; 32.076]. It is found in the amino acids cysteine and methionine. | 2.02 | 1 | 0 | chalcogen;
nonmetal atom | macronutrient |
phosphorus
Phosphorus: A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions. | 2.02 | 1 | 0 | monoatomic phosphorus;
nonmetal atom;
pnictogen | macronutrient |
beta-escin
[no description available] | 2.45 | 2 | 0 | | |
oleanane
oleanane: from the aerial roots of Ficus microcarpa; structure in first source | 7.45 | 2 | 0 | terpenoid fundamental parent;
triterpene | |
lipid a
Lipid A: Lipid A is the biologically active component of lipopolysaccharides. It shows strong endotoxic activity and exhibits immunogenic properties.. lipid A : The glycolipid moiety of bacterial lipopolysaccharide (R can be either hydrogen or a fatty acyl group). | 2.1 | 1 | 0 | dodecanoate ester;
lipid A;
tetradecanoate ester | Escherichia coli metabolite |
ribose
ribopyranose : The pyranose form of ribose. | 2.03 | 1 | 0 | D-ribose;
ribopyranose | |
32,33,34,35-bacteriohopanetetrol
32,33,34,35-bacteriohopanetetrol: hopanoid from Rhodopseudomonas acidophila; structure given in first source. bacteriohopane-32,33,34,35-tetrol : A hopanoid that is bacteriohopane carrying four hydroxy substituents at positions 32, 33, 34 and 35. | 3.01 | 4 | 0 | hopanoid;
tetrol | antimicrobial agent;
bacterial metabolite;
lipoxygenase inhibitor |
phosphatidylcholines
Phosphatidylcholines: Derivatives of PHOSPHATIDIC ACIDS in which the phosphoric acid is bound in ester linkage to a CHOLINE moiety. | 2.4 | 2 | 0 | 1,2-diacyl-sn-glycero-3-phosphocholine | |
ubiquinone
Ubiquinone: A lipid-soluble benzoquinone which is involved in ELECTRON TRANSPORT in mitochondrial preparations. The compound occurs in the majority of aerobic organisms, from bacteria to higher plants and animals. | 2.1 | 1 | 0 | | |
glycolipids
[no description available] | 2.66 | 3 | 0 | | |
lupane
lupane: has antineoplastic activity; structure in first source | 7.15 | 1 | 0 | | |
phenanthrenes
Phenanthrenes: POLYCYCLIC AROMATIC HYDROCARBONS composed of three fused BENZENE rings.. phenanthrenes : Any benzenoid aromatic compound that consists of a phenanthrene skeleton and its substituted derivatives thereof. | 2.46 | 2 | 0 | | |