| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
acetone
methyl ketone : A ketone of formula RC(=O)CH3 (R =/= H). | 2.08 | 1 | 0 | ketone body;
methyl ketone;
propanones;
volatile organic compound | EC 3.5.1.4 (amidase) inhibitor;
human metabolite;
polar aprotic solvent |
benzene
[no description available] | 1.97 | 1 | 0 | aromatic annulene;
benzenes;
volatile organic compound | carcinogenic agent;
environmental contaminant;
non-polar solvent |
dimethyl sulfoxide
Dimethyl Sulfoxide: A highly polar organic liquid, that is used widely as a chemical solvent. Because of its ability to penetrate biological membranes, it is used as a vehicle for topical application of pharmaceuticals. It is also used to protect tissue during CRYOPRESERVATION. Dimethyl sulfoxide shows a range of pharmacological activity including analgesia and anti-inflammation.. dimethyl sulfoxide : A 2-carbon sulfoxide in which the sulfur atom has two methyl substituents. | 1.98 | 1 | 0 | sulfoxide;
volatile organic compound | alkylating agent;
antidote;
Escherichia coli metabolite;
geroprotector;
MRI contrast agent;
non-narcotic analgesic;
polar aprotic solvent;
radical scavenger |
dihydroxyphenylalanine
Dihydroxyphenylalanine: A beta-hydroxylated derivative of phenylalanine. The D-form of dihydroxyphenylalanine has less physiologic activity than the L-form and is commonly used experimentally to determine whether the pharmacological effects of LEVODOPA are stereospecific.. dopa : A hydroxyphenylalanine carrying hydroxy substituents at positions 3 and 4 of the benzene ring. | 3.33 | 2 | 0 | hydroxyphenylalanine;
non-proteinogenic alpha-amino acid;
tyrosine derivative | human metabolite |
nitrates
Nitrates: Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- radical. | 2.69 | 3 | 0 | monovalent inorganic anion;
nitrogen oxoanion;
reactive nitrogen species | |
thymine
[no description available] | 3.07 | 1 | 0 | pyrimidine nucleobase;
pyrimidone | Escherichia coli metabolite;
human metabolite;
mouse metabolite |
uric acid
Uric Acid: An oxidation product, via XANTHINE OXIDASE, of oxypurines such as XANTHINE and HYPOXANTHINE. It is the final oxidation product of purine catabolism in humans and primates, whereas in most other mammals URATE OXIDASE further oxidizes it to ALLANTOIN.. uric acid : An oxopurine that is the final oxidation product of purine metabolism.. 6-hydroxy-1H-purine-2,8(7H,9H)-dione : A tautomer of uric acid having oxo groups at C-2 and C-8 and a hydroxy group at C-6.. 7,9-dihydro-1H-purine-2,6,8(3H)-trione : An oxopurine in which the purine ring is substituted by oxo groups at positions 2, 6, and 8. | 2 | 1 | 0 | uric acid | Escherichia coli metabolite;
human metabolite;
mouse metabolite |
1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine
1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine: A dopaminergic neurotoxic compound which produces irreversible clinical, chemical, and pathological alterations that mimic those found in Parkinson disease.. 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine : A tetrahydropyridine that is 1,2,3,6-tetrahydropyridine substituted by a methyl group at position 1 and a phenyl group at position 4. | 2 | 1 | 0 | methylpyridines;
phenylpyridine;
tetrahydropyridine | neurotoxin |
carvedilol
[no description available] | 2 | 1 | 0 | carbazoles;
secondary alcohol;
secondary amino compound | alpha-adrenergic antagonist;
antihypertensive agent;
beta-adrenergic antagonist;
cardiovascular drug;
vasodilator agent |
pentetic acid
Pentetic Acid: An iron chelating agent with properties like EDETIC ACID. DTPA has also been used as a chelator for other metals, such as plutonium. | 2 | 1 | 0 | pentacarboxylic acid | copper chelator |
hydroxyproline
Hydroxyproline: A hydroxylated form of the imino acid proline. A deficiency in ASCORBIC ACID can result in impaired hydroxyproline formation.. hydroxyproline : A proline derivative that is proline substituted by at least one hydroxy group. | 1.98 | 1 | 0 | 4-hydroxyproline;
L-alpha-amino acid zwitterion | human metabolite;
mouse metabolite;
plant metabolite |
triiodothyronine
Triiodothyronine: A T3 thyroid hormone normally synthesized and secreted by the thyroid gland in much smaller quantities than thyroxine (T4). Most T3 is derived from peripheral monodeiodination of T4 at the 5' position of the outer ring of the iodothyronine nucleus. The hormone finally delivered and used by the tissues is mainly T3.. 3,3',5-triiodo-L-thyronine : An iodothyronine compound having iodo substituents at the 3-, 3'- and 5-positions. Although some is produced in the thyroid, most of the 3,3',5-triiodo-L-thyronine in the body is generated by mono-deiodination of L-thyroxine in the peripheral tissues. Its metabolic activity is about 3 to 5 times that of L-thyroxine. The sodium salt is used in the treatment of hypothyroidism. | 2 | 1 | 0 | 2-halophenol;
amino acid zwitterion;
iodophenol;
iodothyronine | human metabolite;
mouse metabolite;
thyroid hormone |
lysine
Lysine: An essential amino acid. It is often added to animal feed.. lysine : A diamino acid that is caproic (hexanoic) acid bearing two amino substituents at positions 2 and 6.. L-lysine : An L-alpha-amino acid; the L-isomer of lysine. | 2.68 | 3 | 0 | aspartate family amino acid;
L-alpha-amino acid zwitterion;
L-alpha-amino acid;
lysine;
organic molecular entity;
proteinogenic amino acid | algal metabolite;
anticonvulsant;
Escherichia coli metabolite;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
plant metabolite;
Saccharomyces cerevisiae metabolite |
levodopa
Levodopa: The naturally occurring form of DIHYDROXYPHENYLALANINE and the immediate precursor of DOPAMINE. Unlike dopamine itself, it can be taken orally and crosses the blood-brain barrier. It is rapidly taken up by dopaminergic neurons and converted to DOPAMINE. It is used for the treatment of PARKINSONIAN DISORDERS and is usually given with agents that inhibit its conversion to dopamine outside of the central nervous system.. L-dopa : An optically active form of dopa having L-configuration. Used to treat the stiffness, tremors, spasms, and poor muscle control of Parkinson's disease | 2.06 | 1 | 0 | amino acid zwitterion;
dopa;
L-tyrosine derivative;
non-proteinogenic L-alpha-amino acid | allelochemical;
antidyskinesia agent;
antiparkinson drug;
dopaminergic agent;
hapten;
human metabolite;
mouse metabolite;
neurotoxin;
plant growth retardant;
plant metabolite;
prodrug |
tyrosine
Tyrosine: A non-essential amino acid. In animals it is synthesized from PHENYLALANINE. It is also the precursor of EPINEPHRINE; THYROID HORMONES; and melanin.. tyrosine : An alpha-amino acid that is phenylalanine bearing a hydroxy substituent at position 4 on the phenyl ring. | 12.16 | 48 | 4 | 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 |
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. | 2.11 | 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 |
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. | 1.99 | 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 |
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. | 8.37 | 13 | 1 | 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 |
mannitol
[no description available] | 1.98 | 1 | 0 | mannitol | allergen;
antiglaucoma drug;
compatible osmolytes;
Escherichia coli metabolite;
food anticaking agent;
food bulking agent;
food humectant;
food stabiliser;
food thickening agent;
hapten;
metabolite;
osmotic diuretic;
sweetening agent |
arginine
Arginine: An essential amino acid that is physiologically active in the L-form.. arginine : An alpha-amino acid that is glycine in which the alpha-is substituted by a 3-guanidinopropyl group. | 2.39 | 2 | 0 | arginine;
glutamine family amino acid;
L-alpha-amino acid;
proteinogenic amino acid | biomarker;
Escherichia coli metabolite;
micronutrient;
mouse metabolite;
nutraceutical |
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. | 1.99 | 1 | 0 | benzenes;
piperidines | anaesthetic;
neurotoxin;
NMDA receptor antagonist;
psychotropic drug |
quinoxalines
quinoxaline : A naphthyridine in which the nitrogens are at positions 1 and 4. | 1.99 | 1 | 0 | mancude organic heterobicyclic parent;
naphthyridine;
ortho-fused heteroarene | |
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. | 1.98 | 1 | 0 | catechin | antioxidant;
plant metabolite |
cyclopentane
Cyclopentanes: A group of alicyclic hydrocarbons with the general formula R-C5H9.. cyclopentanes : Cyclopentane and its derivatives formed by substitution. | 2.1 | 1 | 0 | cycloalkane;
cyclopentanes;
volatile organic compound | non-polar solvent |
kainic acid
Kainic Acid: (2S-(2 alpha,3 beta,4 beta))-2-Carboxy-4-(1-methylethenyl)-3-pyrrolidineacetic acid. Ascaricide obtained from the red alga Digenea simplex. It is a potent excitatory amino acid agonist at some types of excitatory amino acid receptors and has been used to discriminate among receptor types. Like many excitatory amino acid agonists it can cause neurotoxicity and has been used experimentally for that purpose. | 1.99 | 1 | 0 | dicarboxylic acid;
L-proline derivative;
non-proteinogenic L-alpha-amino acid;
pyrrolidinecarboxylic acid | antinematodal drug;
excitatory amino acid agonist |
sodium carbonate
sodium carbonate: used topically for dermatitides, mouthwash, vaginal douche; veterinary use as emergency emetic; RN given refers to carbonic acid, di-Na salt; structure | 1.98 | 1 | 0 | carbonate salt;
organic sodium salt | |
4,6-dinitro-o-cresol
4,6-dinitro-o-cresol: RN given refers to parent cpd; structure. 4,6-dinitro-o-cresol : A hydroxytoluene that is o-cresol carrying nitro substituents at positions 4 and 6. | 1.99 | 1 | 0 | dinitrophenol acaricide;
hydroxytoluene;
nitrotoluene | dinitrophenol insecticide;
fungicide;
herbicide |
thymine glycol
thymine glycol: forms photodimers (thymine dimers) under UV; RN given refers to cpd without isomeric designation | 3.07 | 1 | 0 | hydroxypyrimidine | |
carbonates
Carbonates: Salts or ions of the theoretical carbonic acid, containing the radical CO2(3-). Carbonates are readily decomposed by acids. The carbonates of the alkali metals are water-soluble; all others are insoluble. (From Grant & Hackh's Chemical Dictionary, 5th ed). carbonates : Organooxygen compounds that are salts or esters of carbonic acid, H2CO3. | 1.98 | 1 | 0 | carbon oxoanion | |
n-methylaspartate
N-Methylaspartate: An amino acid that, as the D-isomer, is the defining agonist for the NMDA receptor subtype of glutamate receptors (RECEPTORS, NMDA).. N-methyl-D-aspartic acid : An aspartic acid derivative having an N-methyl substituent and D-configuration. | 1.99 | 1 | 0 | amino dicarboxylic acid;
D-alpha-amino acid;
D-aspartic acid derivative;
secondary amino compound | neurotransmitter agent |
hypochlorous acid
Hypochlorous Acid: An oxyacid of chlorine (HClO) containing monovalent chlorine that acts as an oxidizing or reducing agent.. hypochlorous acid : A chlorine oxoacid with formula HOCl; a weak, unstable acid, it is the active form of chlorine in water. | 2 | 1 | 0 | chlorine oxoacid;
reactive oxygen species | EC 2.5.1.18 (glutathione transferase) inhibitor;
EC 3.1.1.7 (acetylcholinesterase) inhibitor;
human metabolite |
cysteic acid
Cysteic Acid: Beta-Sulfoalanine. An amino acid with a C-terminal sulfonic acid group which has been isolated from human hair oxidized with permanganate. It occurs normally in the outer part of the sheep's fleece, where the wool is exposed to light and weather.. cysteic acid : An amino sulfonic acid that is the sulfonic acid analogue of cysteine. | 1.99 | 1 | 0 | alanine derivative;
amino sulfonic acid;
carboxyalkanesulfonic acid;
cysteine derivative;
non-proteinogenic alpha-amino acid | animal metabolite |
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. | 2.1 | 1 | 0 | benzenes;
phenyl acetates | |
glutamic acid
Glutamic Acid: A non-essential amino acid naturally occurring in the L-form. Glutamic acid is the most common excitatory neurotransmitter in the CENTRAL NERVOUS SYSTEM.. glutamic acid : An alpha-amino acid that is glutaric acid bearing a single amino substituent at position 2. | 1.99 | 1 | 0 | glutamic acid;
glutamine family amino acid;
L-alpha-amino acid;
proteinogenic amino acid | Escherichia coli metabolite;
ferroptosis inducer;
micronutrient;
mouse metabolite;
neurotransmitter;
nutraceutical |
sq-11725
Nadolol: A non-selective beta-adrenergic antagonist with a long half-life, used in cardiovascular disease to treat arrhythmias, angina pectoris, and hypertension. Nadolol is also used for MIGRAINE DISORDERS and for tremor.. nadolol : Nadolol is a diastereoisomeric mixture consisting of equimolar amounts of the four possible 2,3-cis-isomers of 5-[3-(tert-butylamino)-2-hydroxypropoxy]-1,2,3,4-tetrahydronaphthalene-2,3-diol. | 3.39 | 1 | 1 | | |
peroxynitric acid
[no description available] | 2.69 | 3 | 0 | nitrogen oxoacid | |
6-hydroxydopa
6-hydroxydopa: RN given refers to cpd without isomeric designation | 1.99 | 1 | 0 | non-proteinogenic alpha-amino acid | |
dityrosine
dityrosine: o,o'-biphenol analog of tyrosine; isolated from insoluble protein of human cataractous lenses; structure. dityrosine : A biphenyl compound comprising two tyrosine residues linked at carbon-3 of their benzene rings. | 3.5 | 8 | 0 | biphenyls;
non-proteinogenic alpha-amino acid;
tyrosine derivative | biomarker |
3-chloro-L-tyrosine
3-chloro-L-tyrosine : A chloroamino acid comprising a tyrosine core with a chloro- substituent ortho to the phenolic hydroxy group. | 2 | 1 | 0 | chloroamino acid;
L-alpha-amino acid zwitterion;
L-tyrosine derivative;
monochlorobenzenes;
non-proteinogenic L-alpha-amino acid | biomarker;
human metabolite |
pentosidine
pentosidine: structure given in first source. pentosidine : An imidazopyridine having norleucine and ornithine residues attached via their side-chains at the 4- and 2-positions respectively. | 1.99 | 1 | 0 | imidazopyridine;
non-proteinogenic L-alpha-amino acid | biomarker;
cross-linking reagent |
n(6)-carboxymethyllysine
N(6)-carboxymethyllysine: RN given refers to (L)-isomer; structure given in first source. N(6)-carboxymethyl-L-lysine : An L-lysine derivative with a carboxymethyl substituent at the N(6)-position. | 2.68 | 3 | 0 | L-lysine derivative;
non-proteinogenic L-alpha-amino acid | antigen |
hydroxyl radical
Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent. | 6.09 | 9 | 0 | oxygen hydride;
oxygen radical;
reactive oxygen species | |
alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid
[no description available] | 1.99 | 1 | 0 | | |
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. | 3.09 | 5 | 0 | 2-nitrophenols;
C-nitro compound;
nitrotyrosine;
non-proteinogenic alpha-amino acid | |
resveratrol
trans-resveratrol : A resveratrol in which the double bond has E configuration. | 6.76 | 3 | 3 | resveratrol | antioxidant;
phytoalexin;
plant metabolite;
quorum sensing inhibitor;
radical scavenger |
stilbenes
Stilbenes: Organic compounds that contain 1,2-diphenylethylene as a functional group.. trans-stilbene : The trans-isomer of stilbene. | 6.76 | 3 | 3 | stilbene | |
urocanic acid
Urocanic Acid: 4-Imidazoleacrylic acid.. urocanic acid : An alpha,beta-unsaturated monocarboxylic acid that is prop-2-enoic acid substituted by a 1H-imidazol-4-yl group at position 3. It is a metabolite of hidtidine.. trans-urocanic acid : A urocanic acid in which the double bond of the carboxyethene moiety has E configuration. | 2.31 | 1 | 0 | urocanic acid | human metabolite |
fg 9041
FG 9041: structure given in first source | 1.99 | 1 | 0 | quinoxaline derivative | |
bilirubin
[no description available] | 2.03 | 1 | 0 | biladienes;
dicarboxylic acid | antioxidant;
human metabolite;
mouse metabolite |
linoleic acid
Linoleic Acid: A doubly unsaturated fatty acid, occurring widely in plant glycosides. It is an essential fatty acid in mammalian nutrition and is used in the biosynthesis of prostaglandins and cell membranes. (From Stedman, 26th ed). linoleic acid : An octadecadienoic acid in which the two double bonds are at positions 9 and 12 and have Z (cis) stereochemistry. | 3.39 | 1 | 1 | octadecadienoic acid;
omega-6 fatty acid | algal metabolite;
Daphnia galeata metabolite;
plant metabolite |
thebaine
Thebaine: A drug that is derived from opium, which contains from 0.3-1.5% thebaine depending on its origin. It produces strychnine-like convulsions rather than narcosis. It may be habit-forming and is a controlled substance (opiate) listed in the U.S. Code of Federal Regulations, Title 21 Part 1308.12 (1985). (From Merck Index, 11th ed) | 2.1 | 1 | 0 | morphinane alkaloid;
organic heteropentacyclic compound | |
dizocilpine maleate
Dizocilpine Maleate: A potent noncompetitive antagonist of the NMDA receptor (RECEPTORS, N-METHYL-D-ASPARTATE) used mainly as a research tool. The drug has been considered for the wide variety of neurodegenerative conditions or disorders in which NMDA receptors may play an important role. Its use has been primarily limited to animal and tissue experiments because of its psychotropic effects.. dizocilpine maleate : A maleate salt obtained by reaction of dizocilpine with one equivalent of maleic acid. | 1.99 | 1 | 0 | maleate salt;
tetracyclic antidepressant | anaesthetic;
anticonvulsant;
neuroprotective agent;
nicotinic antagonist;
NMDA receptor antagonist |
3-tyrosine
3-tyrosine: RN given refers to cpd with unspecified isomeric designation. L-m-tyrosine : A hydroxyphenylalanine that is L-phenylalanine with a substituent hydroxy group at position 3. | 8.63 | 17 | 1 | hydroxyphenylalanine;
L-alpha-amino acid zwitterion;
L-phenylalanine derivative;
non-proteinogenic L-alpha-amino acid;
phenols | plant metabolite |
fructosyl-lysine
fructosyllysine : A glyco-amino acid consisting of a D-fructosyl residue attached to the epsilon-amino group of L-lysine. | 1.99 | 1 | 0 | fructosamine;
glyco-amino acid | Escherichia coli metabolite |
methionine sulfoxide
methionine sulfoxide: RN given refers to cpd without isomeric designation. L-methionine (R)-S-oxide : The (R)-oxido diastereomer of L-methionine S-oxide. | 1.99 | 1 | 0 | amino acid zwitterion;
L-methionine S-oxide | Escherichia coli metabolite |
methyl jasmonate
[no description available] | 2.1 | 1 | 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. | 1.98 | 1 | 0 | | |
deoxyguanosine
[no description available] | 2.03 | 1 | 0 | purine 2'-deoxyribonucleoside;
purines 2'-deoxy-D-ribonucleoside | Escherichia coli metabolite;
human metabolite;
mouse metabolite;
Saccharomyces cerevisiae metabolite |
8-hydroxy-2'-deoxyguanosine
8-Hydroxy-2'-Deoxyguanosine: Common oxidized form of deoxyguanosine in which C-8 position of guanine base has a carbonyl group.. 8-hydroxy-2'-deoxyguanosine : Guanosine substituted at the purine 8-position by a hydroxy group. It is used as a biomarker of oxidative DNA damage. | 2.03 | 1 | 0 | guanosines | biomarker |