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). | 2.17 | 1 | 0 | alkane;
gas molecular entity;
mononuclear parent hydride;
one-carbon compound | bacterial metabolite;
fossil fuel;
greenhouse gas |
coumarin
2H-chromen-2-one: coumarin derivative | 2.11 | 1 | 0 | coumarins | fluorescent dye;
human metabolite;
plant metabolite |
salicylic acid
Scalp: The outer covering of the calvaria. It is composed of several layers: SKIN; subcutaneous connective tissue; the occipitofrontal muscle which includes the tendinous galea aponeurotica; loose connective tissue; and the pericranium (the PERIOSTEUM of the SKULL). | 2.05 | 1 | 0 | monohydroxybenzoic acid | algal metabolite;
antifungal agent;
antiinfective agent;
EC 1.11.1.11 (L-ascorbate peroxidase) inhibitor;
keratolytic drug;
plant hormone;
plant metabolite |
2-butynedioic acid
2-butynedioic acid: RN given refers to parent cpd. butynedioic acid : An acetylenic compound that is acetylene in which the hydrogens are replaced by carboxy groups. | 2.15 | 1 | 0 | acetylenic compound;
C4-dicarboxylic acid | |
glycine
[no description available] | 2 | 1 | 0 | alpha-amino acid;
amino acid zwitterion;
proteinogenic amino acid;
serine family amino acid | EC 2.1.2.1 (glycine hydroxymethyltransferase) inhibitor;
fundamental metabolite;
hepatoprotective agent;
micronutrient;
neurotransmitter;
NMDA receptor agonist;
nutraceutical |
hydrogen
Hydrogen: The first chemical element in the periodic table with atomic symbol H, and atomic number 1. Protium (atomic weight 1) is by far the most common hydrogen isotope. Hydrogen also exists as the stable isotope DEUTERIUM (atomic weight 2) and the radioactive isotope TRITIUM (atomic weight 3). Hydrogen forms into a diatomic molecule at room temperature and appears as a highly flammable colorless and odorless gas.. dihydrogen : An elemental molecule consisting of two hydrogens joined by a single bond. | 7 | 1 | 0 | elemental hydrogen;
elemental molecule;
gas molecular entity | antioxidant;
electron donor;
food packaging gas;
fuel;
human metabolite |
phenylacetic acid
phenylacetic acid : A monocarboxylic acid that is toluene in which one of the hydrogens of the methyl group has been replaced by a carboxy group. | 2.17 | 1 | 0 | benzenes;
monocarboxylic acid;
phenylacetic acids | allergen;
Aspergillus metabolite;
auxin;
EC 6.4.1.1 (pyruvate carboxylase) inhibitor;
Escherichia coli metabolite;
human metabolite;
plant growth retardant;
plant metabolite;
Saccharomyces cerevisiae metabolite;
toxin |
phosphoric acid
phosphoric acid: concise etchant is 37% H3PO4. phosphoric acid : A phosphorus oxoacid that consists of one oxo and three hydroxy groups joined covalently to a central phosphorus atom. | 7.11 | 1 | 0 | phosphoric acids | algal metabolite;
fertilizer;
human metabolite;
NMR chemical shift reference compound;
solvent |
acetohydroxamic acid
acetohydroxamic acid: urease inhibitor. oxime : Compounds of structure R2C=NOH derived from condensation of aldehydes or ketones with hydroxylamine. Oximes from aldehydes may be called aldoximes; those from ketones may be called ketoximes.. N-hydroxyacetimidic acid : A carbohydroximic acid consisting of acetimidic acid having a hydroxy group attached to the imide nitrogen.. acetohydroxamic acid : A member of the class of acetohydroxamic acids that is acetamide in which one of the amino hydrogens has been replaced by a hydroxy group. | 2.15 | 1 | 0 | acetohydroxamic acids;
carbohydroximic acid | algal metabolite;
EC 3.5.1.5 (urease) inhibitor |
sucrose
Saccharum: A plant genus of the family POACEAE widely cultivated in the tropics for the sweet cane that is processed into sugar. | 2.06 | 1 | 0 | glycosyl glycoside | algal metabolite;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
osmolyte;
Saccharomyces cerevisiae metabolite;
sweetening agent |
leucine
Leucine: An essential branched-chain amino acid important for hemoglobin formation.. leucine : A branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by an isobutyl group. | 2.08 | 1 | 0 | amino acid zwitterion;
L-alpha-amino acid;
leucine;
proteinogenic amino acid;
pyruvate family amino acid | algal metabolite;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
plant metabolite;
Saccharomyces cerevisiae metabolite |
phenylalanine
Phenylalanine: An essential aromatic amino acid that is a precursor of MELANIN; DOPAMINE; noradrenalin (NOREPINEPHRINE), and THYROXINE.. L-phenylalanine : The L-enantiomer of phenylalanine.. phenylalanine : An aromatic amino acid that is alanine in which one of the methyl hydrogens is substituted by a phenyl group. | 2.25 | 1 | 0 | amino acid zwitterion;
erythrose 4-phosphate/phosphoenolpyruvate family amino acid;
L-alpha-amino acid;
phenylalanine;
proteinogenic amino acid | algal metabolite;
EC 3.1.3.1 (alkaline phosphatase) inhibitor;
Escherichia coli metabolite;
human xenobiotic metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
plant metabolite;
Saccharomyces cerevisiae metabolite |
valine
Valine: A branched-chain essential amino acid that has stimulant activity. It promotes muscle growth and tissue repair. It is a precursor in the penicillin biosynthetic pathway.. valine : A branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by an isopropyl group.. L-valine : The L-enantiomer of valine. | 2.08 | 1 | 0 | L-alpha-amino acid zwitterion;
L-alpha-amino acid;
proteinogenic amino acid;
pyruvate family amino acid;
valine | algal metabolite;
Escherichia coli metabolite;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
Saccharomyces cerevisiae metabolite |
isoleucine
Isoleucine: An essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of LEUCINE. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels.. isoleucine : A 2-amino-3-methylpentanoic acid having either (2R,3R)- or (2S,3S)-configuration.. L-isoleucine : The L-enantiomer of isoleucine. | 2.08 | 1 | 0 | aspartate family amino acid;
isoleucine;
L-alpha-amino acid zwitterion;
L-alpha-amino acid;
proteinogenic amino acid | algal metabolite;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
plant metabolite;
Saccharomyces cerevisiae metabolite |
divinyl sulfone
divinyl sulfone: cross-linking reagent for agarose gels. divinyl sulfone : A sulfone compound having two S-vinyl substituents. | 2.11 | 1 | 0 | sulfone | cross-linking reagent |
cyclopentane
Cyclopentanes: A group of alicyclic hydrocarbons with the general formula R-C5H9.. cyclopentanes : Cyclopentane and its derivatives formed by substitution. | 3.58 | 2 | 0 | cycloalkane;
cyclopentanes;
volatile organic compound | non-polar solvent |
propiolic acid
propiolic acid: RN given refers to parent cpd; structure. propynoic acid : A terminal acetylenic compound that is a 3-carbon, straight-chain, monounsaturated fatty acid having one acetylenic bond. | 2.15 | 1 | 0 | acetylenic fatty acid;
alpha,beta-unsaturated monocarboxylic acid;
monounsaturated fatty acid;
short-chain fatty acid;
terminal acetylenic compound | xenobiotic metabolite |
eosine yellowish-(ys)
Eosine Yellowish-(YS): A versatile red dye used in cosmetics, pharmaceuticals, textiles, etc., and as tissue stain, vital stain, and counterstain with HEMATOXYLIN. It is also used in special culture media.. eosin YS dye : An organic sodium salt that is 2',4',5',7'-tetrabromofluorescein in which the carboxy group and the phenolic hydroxy group have been deprotonated and the resulting charge is neutralised by two sodium ions. | 2.11 | 1 | 0 | organic sodium salt;
organobromine compound | fluorochrome;
histological dye |
acetylenedicarboxylic acid dimethyl ester
acetylenedicarboxylic acid dimethyl ester: inhibitor of oxidative phosphorylation | 2.15 | 1 | 0 | | |
cyclopentenone
2-cyclopenten-1-one : An enone that is cyclopentanone having a C=C double bond at position 2. | 2.15 | 1 | 0 | alicyclic ketone;
enone | Hsp70 inducer |
2-cyclohexen-1-one
2-cyclohexen-1-one: RN given refers to unlabeled cpd with specified locant for double bond. cyclohexenone : The parent compound of the cyclohexenones, composed of cyclohexanone having one double bond in the ring.. cyclohex-2-enone : A cyclohexenone having its C=C double bond at the 2-position. | 2.15 | 1 | 0 | cyclohexenone | |
2-octynoic acid
[no description available] | 2.05 | 1 | 0 | acetylenic fatty acid;
monounsaturated fatty acid | |
palladium
Palladium: A chemical element having an atomic weight of 106.4, atomic number of 46, and the symbol Pd. It is a white, ductile metal resembling platinum, and following it in abundance and importance of applications. It is used in dentistry in the form of gold, silver, and copper alloys.. palladium : Chemical element (nickel group element atom) with atomic number 46. | 2.48 | 2 | 0 | metal allergen;
nickel group element atom;
platinum group metal atom | |
sodium sulfate
[no description available] | 2.11 | 1 | 0 | inorganic sodium salt | |
azides
Azides: Organic or inorganic compounds that contain the -N3 group.. azide : Any nitrogen molecular entity containing the group -N3. | 2.57 | 2 | 0 | pseudohalide anion | mitochondrial respiratory-chain inhibitor |
nitroaniline
nitroaniline: RN given refers to cpd with unspecified locant for nitro moiety. nitroaniline : A substituted aniline that carries one or more nitro groups. | 2 | 1 | 0 | | |
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. | 2.11 | 1 | 0 | D-glucopyranose | epitope;
mouse metabolite |
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. | 2.57 | 2 | 0 | 1,2,3-triazole | |
2-butynoic acid
[no description available] | 2.15 | 1 | 0 | | |
n-acetylglutamic acid
N-acetylglutamic acid: RN given refers to (L)-isomer. N-acetyl-L-glutamic acid : An N-acyl-L-amino acid that is L-glutamic acid in which one of the amine hydrogens is substituted by an acetyl group. | 2.05 | 1 | 0 | N-acetyl-L-amino acid;
N-acyl-L-glutamic acid | human metabolite;
Saccharomyces cerevisiae metabolite |
ethyl 2-butynoate
[no description available] | 2.15 | 1 | 0 | | |
ethylphenylpropiolate
ethylphenylpropiolate: structure | 2.15 | 1 | 0 | | |
quinone methide
quinone methide: intermediate in eumelanin biosynthesis; structure given in first source. quinomethane : A methylidenecyclohexadienone, formally derived from a benzoquinone by replacement of one of the quinone oxygens by a methylidene group. | 2.17 | 1 | 0 | quinomethane | |
betadex
beta-Cyclodextrins: Cyclic GLUCANS consisting of seven (7) glucopyranose units linked by 1,4-glycosidic bonds. | 2 | 1 | 0 | cyclodextrin | |
aconitic acid
trans-aconitic acid : The trans-isomer of aconitic acid. | 2.15 | 1 | 0 | aconitic acid | fundamental metabolite |
maleic acid
maleic acid: RN given refers to parent cpd(Z)-isomer which is maleic acid; all RR's given refer to (Z)-isomer; (E)-isomer is fumaric acid. maleic acid : A butenedioic acid in which the double bond has cis- (Z)-configuration. | 2.15 | 1 | 0 | butenedioic acid | algal metabolite;
mouse metabolite;
plant metabolite |
e-z cinnamic acid
cinnamic acid : A monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia.. trans-cinnamic acid : The E (trans) isomer of cinnamic acid | 2.15 | 1 | 0 | cinnamic acid | plant metabolite |
fumaric acid
fumaric acid: see also record for ferrous fumarate; use FUMARATES for general fumaric acid esters. fumaric acid : A butenedioic acid in which the C=C double bond has E geometry. It is an intermediate metabolite in the citric acid cycle. | 2.15 | 1 | 0 | butenedioic acid | food acidity regulator;
fundamental metabolite;
geroprotector |
dimethyl fumarate
[no description available] | 2.15 | 1 | 0 | diester;
enoate ester;
methyl ester | antipsoriatic;
immunomodulator |
glycosides
[no description available] | 2.11 | 1 | 0 | | |
ethyl cinnamate
ethyl cinnamate: a pine weevil antifeedant; structure in first source | 2.15 | 1 | 0 | alkyl cinnamate;
ethyl ester | |
diethyl fumarate
diethyl fumarate : A dieter obtained by the formal condensation of fumaric acid with ethanol. | 2.15 | 1 | 0 | diester | metabolite |
3-(4-methylbenzoyl)acrylic acid
[no description available] | 2.15 | 1 | 0 | carbonyl compound | |
alpha-chymotrypsin
Chymotrypsin: A serine endopeptidase secreted by the pancreas as its zymogen, CHYMOTRYPSINOGEN and carried in the pancreatic juice to the duodenum where it is activated by TRYPSIN. It selectively cleaves aromatic amino acids on the carboxyl side. | 2.05 | 1 | 0 | | |
dimethyl maleate
dimethyl maleate: structure. dimethyl maleate : A maleate ester resulting from the formal condensation of both carboxy groups of maleic acid with methanol. It is commonly used as a dienophile for Diels-Alder-type cycloaddition reactions in organic synthesis. | 2.15 | 1 | 0 | diester;
maleate ester;
methyl ester | |
jasmonic acid
jasmonic acid: a derivative of alpha-linolenic acid that has a role in plant response to herbivory analogous to the role of prostanoids in inflammation in mammals;. jasmonic acid : An oxo monocarboxylic acid that is (3-oxocyclopentyl)acetic acid substituted by a (2Z)-pent-2-en-1-yl group at position 2 of the cyclopentane ring. | 3.58 | 2 | 0 | oxo monocarboxylic acid | jasmonates;
plant metabolite |
cucurbitacin c
cucurbitacin C: structure in first source | 2.25 | 1 | 0 | cucurbitacin | |
ethyl fumarate
[no description available] | 2.15 | 1 | 0 | | |
albiflorin
albiflorin: glucoside in peony roots. albiflorin : A monoterpene glycoside with formula C23H28O11, originally isolated from the roots of Paeonia lactiflora. | 2.11 | 1 | 0 | benzoate ester;
beta-D-glucoside;
bridged compound;
gamma-lactone;
monoterpene glycoside;
secondary alcohol | neuroprotective agent;
plant metabolite |
warfarin
Warfarin: An anticoagulant that acts by inhibiting the synthesis of vitamin K-dependent coagulation factors. Warfarin is indicated for the prophylaxis and/or treatment of venous thrombosis and its extension, pulmonary embolism, and atrial fibrillation with embolization. It is also used as an adjunct in the prophylaxis of systemic embolism after myocardial infarction. Warfarin is also used as a rodenticide.. warfarin : A racemate comprising equal amounts of (R)- and (S)-warfarin. Extensively used as both an anticoagulant drug and as a pesticide against rats and mice.. 4-hydroxy-3-(3-oxo-1-phenylbutyl)-1-benzopyran-2-one : A member of the class of coumarins that is 4-hydroxycoumarin which is substituted at position 3 by a 1-phenyl-3-oxo-1-butyl group. | 2.11 | 1 | 0 | benzenes;
hydroxycoumarin;
methyl ketone | |
nitrophenols
Nitrophenols: PHENOLS carrying nitro group substituents. | 2 | 1 | 0 | | |
peoniflorin
peoniflorin: from Radix and of Paeonia suffruticosa | 2.11 | 1 | 0 | | |