| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
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. | 2.06 | 1 | 0 | amino acid zwitterion;
gamma-amino acid;
monocarboxylic acid | human metabolite;
neurotransmitter;
Saccharomyces cerevisiae metabolite;
signalling molecule |
5-hydroxytryptophan
5-Hydroxytryptophan: The immediate precursor in the biosynthesis of SEROTONIN from tryptophan. It is used as an antiepileptic and antidepressant.. 5-hydroxytryptophan : A tryptophan derivative that is tryptophan substituted by a hydroxy group at position 5. | 2.89 | 1 | 0 | hydroxytryptophan | human metabolite;
neurotransmitter |
4-hydroxymandelic acid
4-hydroxymandelic acid: RN given refers to cpd without isomeric designation. 4-hydroxymandelic acid : A 2-hydroxy carboxylic acid that is mandelic acid bearing a phenolic hydroxy substituent at position 4. | 1.96 | 1 | 0 | 2-hydroxy carboxylic acid;
phenols | metabolite |
3,4-dihydroxyphenylacetic acid
3,4-Dihydroxyphenylacetic Acid: A deaminated metabolite of LEVODOPA.. (3,4-dihydroxyphenyl)acetic acid : A dihydroxyphenylacetic acid having the two hydroxy substituents located at the 3- and 4-positions. It is a metabolite of dopamine.. dihydroxyphenylacetic acid : A dihydroxy monocarboxylic acid consisting of phenylacetic acid having two phenolic hydroxy substituents. | 2.66 | 3 | 0 | catechols;
dihydroxyphenylacetic acid | human metabolite |
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. | 3.05 | 5 | 0 | hydroxyphenylalanine;
non-proteinogenic alpha-amino acid;
tyrosine derivative | human metabolite |
pyridoxal phosphate
Pyridoxal Phosphate: This is the active form of VITAMIN B 6 serving as a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into pyridoxamine phosphate (PYRIDOXAMINE).. pyridoxal 5'-phosphate : The monophosphate ester obtained by condensation of phosphoric acid with the primary hydroxy group of pyridoxal. | 2.04 | 1 | 0 | methylpyridines;
monohydroxypyridine;
pyridinecarbaldehyde;
vitamin B6 phosphate | coenzyme;
cofactor;
EC 2.7.7.7 (DNA-directed DNA polymerase) inhibitor;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
Saccharomyces cerevisiae metabolite |
vanillin
Vanilla: A plant genus of the family ORCHIDACEAE that is the source of the familiar flavoring used in foods and medicines (FLAVORING AGENTS). | 1.94 | 1 | 0 | benzaldehydes;
monomethoxybenzene;
phenols | anti-inflammatory agent;
anticonvulsant;
antioxidant;
flavouring agent;
plant metabolite |
vanilmandelic acid
Vanilmandelic Acid: A 3-O-methyl ether of 3,4-dihydroxymandelic acid. It is an end-stage metabolite of CATECHOLAMINES; EPINEPHRINE; and NOREPINEPHRINE.. vanillylmandelic acid : An aromatic ether that is the 3-O-methyl ether of 3,4-dihydroxymandelic acid. | 2.89 | 4 | 0 | 2-hydroxy monocarboxylic acid;
aromatic ether;
phenols | human metabolite |
3-methoxytyrosine
[no description available] | 2.89 | 1 | 0 | tyrosine derivative | |
homovanillic acid
Homovanillic Acid: A 3-O-methyl ETHER of (3,4-dihydroxyphenyl)acetic acid.. homovanillate : A hydroxy monocarboxylic acid anion which is obtained by deprotonation of the carboxy group of homovanillic acid.. homovanillic acid : A monocarboxylic acid that is the 3-O-methyl ether of (3,4-dihydroxyphenyl)acetic acid. It is a catecholamine metabolite. | 10.09 | 17 | 0 | guaiacols;
monocarboxylic acid | human metabolite;
mouse metabolite |
hydroxyindoleacetic acid
(5-hydroxyindol-3-yl)acetic acid : A member of the class of indole-3-acetic acids that is indole-3-acetic acid substituted by a hydroxy group at C-5. | 3.58 | 3 | 0 | indole-3-acetic acids | drug metabolite;
human metabolite;
mouse 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 | 3.28 | 2 | 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 |
phenylethyl alcohol
Phenylethyl Alcohol: An antimicrobial, antiseptic, and disinfectant that is used also as an aromatic essence and preservative in pharmaceutics and perfumery.. 2-phenylethanol : A primary alcohol that is ethanol substituted by a phenyl group at position 2. | 1.95 | 1 | 0 | benzenes;
primary alcohol | Aspergillus metabolite;
fragrance;
plant growth retardant;
plant metabolite;
Saccharomyces cerevisiae metabolite |
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. | 2.89 | 1 | 0 | amino acid zwitterion;
erythrose 4-phosphate/phosphoenolpyruvate family amino acid;
L-alpha-amino acid;
proteinogenic amino acid;
tyrosine | EC 1.3.1.43 (arogenate dehydrogenase) inhibitor;
fundamental metabolite;
micronutrient;
nutraceutical |
vanillic acid
Vanillic Acid: A flavoring agent. It is the intermediate product in the two-step bioconversion of ferulic acid to vanillin. (J Biotechnol 1996;50(2-3):107-13).. vanillic acid : A monohydroxybenzoic acid that is 4-hydroxybenzoic acid substituted by a methoxy group at position 3. | 2.37 | 2 | 0 | methoxybenzoic acid;
monohydroxybenzoic acid | plant metabolite |
4-hydroxyphenyllactic acid
4-hydroxyphenyllactic acid: tyrosing metabolite; RN given refers to cpd without isomeric designation. 3-(4-hydroxyphenyl)lactic acid : A 2-hydroxy carboxylic acid that is lactic acid in which one of the methyl hydrogens is substituted by a 4-hydroxyphenyl group. | 1.96 | 1 | 0 | 2-hydroxy carboxylic acid;
phenols | bacterial metabolite;
human metabolite |
methoxyhydroxyphenylglycol
Methoxyhydroxyphenylglycol: Synthesized from endogenous epinephrine and norepinephrine in vivo. It is found in brain, blood, CSF, and urine, where its concentrations are used to measure catecholamine turnover. | 1.96 | 1 | 0 | methoxybenzenes;
phenols | |
3-methoxy-4-hydroxyphenylethanol
3-Methoxy-4-hydroxyphenylethanol: Metabolite of serotonin and norepinephrine. | 1.95 | 1 | 0 | methoxybenzenes;
phenols | |
benzeneboronic acid
[no description available] | 1.96 | 1 | 0 | boronic acids | |
3,4-dihydroxyphenylethanol
3,4-dihydroxyphenylethanol: serotonin metabolite; structure | 1.95 | 1 | 0 | catechols;
primary alcohol | antineoplastic agent;
antioxidant;
metabolite |
vitamin b 6
Vitamin B 6: VITAMIN B 6 refers to several PICOLINES (especially PYRIDOXINE; PYRIDOXAL; & PYRIDOXAMINE) that are efficiently converted by the body to PYRIDOXAL PHOSPHATE which is a coenzyme for synthesis of amino acids, neurotransmitters (serotonin, norepinephrine), sphingolipids, and aminolevulinic acid. During transamination of amino acids, pyridoxal phosphate is transiently converted into PYRIDOXAMINE phosphate. Although pyridoxine and Vitamin B 6 are still frequently used as synonyms, especially by medical researchers, this practice is erroneous and sometimes misleading (EE Snell; Ann NY Acad Sci, vol 585 pg 1, 1990). Most of vitamin B6 is eventually degraded to PYRIDOXIC ACID and excreted in the urine. | 2.03 | 1 | 0 | | |
cystathionine ketimine
cystathionine ketimine: structure given in first source. cystathionine ketimine : A 1-thia-4-azacyclohepta-3-ene-3,5-dicarboxylic acid that has R-configuration. It is cyclic sulfur-containing imino acid detected in bovine brain extracts. | 2.15 | 1 | 0 | 1-thia-4-azacyclohepta-3-ene-3,5-dicarboxylic acid;
sulfur-containing amino acid | human urinary metabolite;
mammalian metabolite;
rat metabolite;
reactive oxygen species generator |
3,4-dihydroxyphenylpropionic acid
3,4-dihydroxyphenylpropionic acid: metabolite of caffeic acid; RN given refers to parent cpd; structure. 3-(3,4-dihydroxyphenyl)propanoic acid : A monocarboxylic acid that is 3-phenylpropionic acid substituted by hydroxy groups at positions 3 and 4. Also known as dihydrocaffeic acid, it is a metabolite of caffeic acid and exhibits antioxidant activity. | 2.06 | 1 | 0 | (dihydroxyphenyl)propanoic acid | antioxidant;
human xenobiotic 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 | 2.06 | 1 | 0 | cinnamic acid | plant metabolite |
ferulic acid
ferulate : A monocarboxylic acid anion obtained by the deprotonation of the carboxy group of ferulic acid. | 2.06 | 1 | 0 | ferulic acids | anti-inflammatory agent;
antioxidant;
apoptosis inhibitor;
cardioprotective agent;
MALDI matrix material;
plant metabolite |
crotonic acid
crotonic acid: a stereospecific unsaturated carboxylic acid found in CROTON OIL. butenoic acid : Any C4, straight-chain fatty acid containing one double bond.. crotonic acid : A but-2-enoic acid with a trans- double bond at C-2. It has been isolated from Daucus carota. | 2.06 | 1 | 0 | 2-butenoic acid | plant metabolite |
cinnamaldehyde
3-phenylprop-2-enal : A member of the class of cinnamaldehydes that is prop-2-enal in which a hydrogen at position 3 has been replaced by a phenyl group. The configuration of the double bond is not specified; the name "cinnamaldehyde" is widely used to refer to the E (trans) isomer.. (E)-cinnamaldehyde : The E (trans) stereoisomer of cinnamaldehyde, the parent of the class of cinnamaldehydes. | 2.06 | 1 | 0 | 3-phenylprop-2-enal;
cinnamaldehydes | antifungal agent;
EC 4.3.1.24 (phenylalanine ammonia-lyase) inhibitor;
flavouring agent;
hypoglycemic agent;
plant metabolite;
sensitiser;
vasodilator agent |
methyl cinnamate
methyl cinnamate: RN given refers to cpd without isomeric designation. methyl cinnamate : A methyl ester resulting from the formal condensation of methyl cinnamic acid with methanol. It is found naturally in the essential oils of Alpinia and Basil leaf oil, and widely used in the flavor and perfume industries.. methyl trans-cinnamate : The E (trans) isomer of methyl cinnamate. | 2.06 | 1 | 0 | methyl cinnamate | antibacterial agent;
fungal metabolite;
nematicide;
plant metabolite |
2-hydroxycinnamic acid
trans-2-coumaric acid : The trans-isomer of 2-coumaric acid.. 2-coumaric acid : A monohydroxycinnamic acid in which the hydroxy substituent is located at C-2 of the phenyl ring. | 2.06 | 1 | 0 | 2-coumaric acid;
phenols | antioxidant;
metabolite |
3-coumaric acid
3-coumaric acid: RN given refers to cpd without isomeric designation in Chemline. trans-3-coumaric acid : A 3-coumaric acid that is phenol substituted with trans-2-propenoic acid at position C-3.. 3-coumaric acid : A monohydroxycinnamic acid in which the hydroxy substituent is located at C-3 of the phenyl ring. | 2.06 | 1 | 0 | 3-coumaric acid | |
trans-4-coumaric acid
hydroxycinnamic acid : Any member of the class of cinnamic acids carrying one or more hydroxy substituents.. trans-4-coumaric acid : The trans-isomer of 4-coumaric acid.. 4-coumaric acid : A coumaric acid in which the hydroxy substituent is located at C-4 of the phenyl ring. | 2.06 | 1 | 0 | 4-coumaric acid | food component;
mouse metabolite;
plant metabolite |
sorbic acid
Sorbic Acid: Mold and yeast inhibitor. Used as a fungistatic agent for foods, especially cheeses.. (2E,4E)-hexa-2,4-dienoic acid : A sorbic acid having trans-double bonds at positions 2 and 4; a food preservative that can induce cutaneous vasodilation and stinging upon topical application to humans. It is the most thermodynamically stable of the four possible geometric isomers possible, as well as the one with the highest antimicrobial activity.. sorbic acid : A hexadienoic acid with double bonds at C-2 and C-4; it has four geometrical isomers, of which the trans,trans-form is naturally occurring. | 2.06 | 1 | 0 | alpha,beta-unsaturated monocarboxylic acid;
sorbic acid | |
caffeic acid
trans-caffeic acid : The trans-isomer of caffeic acid. | 2.06 | 1 | 0 | caffeic acid | geroprotector;
mouse metabolite |
methyl caffeate
methyl caffeate: from plant Gaillardia pulchella. methyl caffeate : An alkyl caffeate ester formed by the formal condensation of caffeic acid with methyl alcohol. | 2.06 | 1 | 0 | alkyl caffeate ester;
methyl ester | |
3-(3,4-dimethoxyphenyl)propenoic acid
3-(3,4-dimethoxyphenyl)propenoic acid: structure given in first source; RN given refers to parent cpd. 3,4-dimethoxycinnamic acid : A methoxycinnamic acid that is trans-cinnamic acid substituted by methoxy groups at positions 3' and 4' respectively. | 2.06 | 1 | 0 | methoxycinnamic acid | |
beta-styrylacrylic acid
beta-styrylacrylic acid: RN given refers to parent cpd; structure | 2.06 | 1 | 0 | | |
chlorogenic acid
caffeoylquinic acid: Antiviral Agent; structure in first source. chlorogenate : A monocarboxylic acid anion that is the conjugate base of chlorogenic acid; major species at pH 7.3. | 2.06 | 1 | 0 | cinnamate ester;
tannin | food component;
plant metabolite |
rosmarinic acid
rosmarinic acid: RN given refers to parent cpd; promote OT project. (R)-rosmarinic acid : A stereoisomer of rosmarinic acid having (R)-configuration.. rosmarinic acid : The 1-carboxy-2-(2,4-dihydroxyphenyl)ethyl ester of trans-caffeic acid. | 2.06 | 1 | 0 | rosmarinic acid | geroprotector;
plant metabolite |
cinnamyl alcohol
cinnamyl alcohol: RN given refers to parent cpd without isomeric designation. (E)-cinnamyl alcohol : The E (trans) stereoisomer of cinnamyl alcohol.. cinnamyl alcohol : A primary alcohol comprising an allyl core with a hydroxy substituent at the 1-position and a phenyl substituent at the 3-position (geometry of the C=C bond unspecified). | 2.06 | 1 | 0 | cinnamyl alcohol | plant metabolite |
cystathionine
Cystathionine: Sulfur-containing amino acid formed as an intermediate in the conversion of METHIONINE to CYSTEINE.. cystathionine : A modified amino acid generated by enzymic means from homocysteine and serine. | 2.41 | 2 | 0 | cysteine derivative | |
cysteinyldopa
Cysteinyldopa: Found in large amounts in the plasma and urine of patients with malignant melanoma. It is therefore used in the diagnosis of melanoma and for the detection of postoperative metastases. Cysteinyldopa is believed to be formed by the rapid enzymatic hydrolysis of 5-S-glutathionedopa found in melanin-producing cells. | 1.95 | 1 | 0 | catecholamine;
zwitterion | |