Substance | Relationship Strength | Studies | Trials | Classes | Roles |
benzene [no description available] | 2.04 | 1 | 0 | aromatic annulene; benzenes; volatile organic compound | carcinogenic agent; environmental contaminant; non-polar solvent |
1-butanol 1-Butanol: A four carbon linear hydrocarbon that has a hydroxy group at position 1.. butan-1-ol : A primary alcohol that is butane in which a hydrogen of one of the methyl groups is substituted by a hydroxy group. It it produced in small amounts in humans by the gut microbes. | 2.11 | 1 | 0 | alkyl alcohol; primary alcohol; short-chain primary fatty alcohol | human metabolite; mouse metabolite; protic solvent |
catechol [no description available] | 3.8 | 3 | 0 | catechols | allelochemical; genotoxin; plant metabolite |
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). | 2.6 | 1 | 0 | alkane; gas molecular entity; mononuclear parent hydride; one-carbon compound | bacterial metabolite; fossil fuel; greenhouse gas |
citric acid, anhydrous Citric Acid: A key intermediate in metabolism. It is an acid compound found in citrus fruits. The salts of citric acid (citrates) can be used as anticoagulants due to their calcium chelating ability.. citric acid : A tricarboxylic acid that is propane-1,2,3-tricarboxylic acid bearing a hydroxy substituent at position 2. It is an important metabolite in the pathway of all aerobic organisms. | 2.44 | 2 | 0 | tricarboxylic acid | antimicrobial agent; chelator; food acidity regulator; fundamental metabolite |
phloroglucinol Phloroglucinol: A trinitrobenzene derivative with antispasmodic properties that is used primarily as a laboratory reagent.. phloroglucinol : A benzenetriol with hydroxy groups at position 1, 3 and 5. | 3.1 | 1 | 0 | benzenetriol; phenolic donor | algal metabolite |
dihydrolipoic acid dihydrolipoic acid: RN given refers to parent cpd without isomeric designation. dihydrolipoic acid : A thio-fatty acid that is reduced form of lipoic acid. A potent antioxidant shown to directly destroy superoxide, hydroperoxy and hydroxyl radicals; also has neuroprotective and anti-tumour effects.. dihydrolipoate : The conjugate base of dihydrolipoic acid. | 2.03 | 1 | 0 | thio-fatty acid | antioxidant; human metabolite; neuroprotective agent |
3-hydroxybutyric acid 3-Hydroxybutyric Acid: BUTYRIC ACID substituted in the beta or 3 position. It is one of the ketone bodies produced in the liver.. 3-hydroxybutyric acid : A straight-chain 3-hydroxy monocarboxylic acid comprising a butyric acid core with a single hydroxy substituent in the 3- position; a ketone body whose levels are raised during ketosis, used as an energy source by the brain during fasting in humans. Also used to synthesise biodegradable plastics. | 2.6 | 1 | 0 | (omega-1)-hydroxy fatty acid; 3-hydroxy monocarboxylic acid; hydroxybutyric 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. | 12.88 | 53 | 0 | hydroxyphenylalanine; non-proteinogenic alpha-amino acid; tyrosine derivative | human 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. | 2.03 | 1 | 0 | dithiolanes; heterocyclic fatty acid; thia fatty acid | fundamental metabolite; geroprotector |
phenol [no description available] | 1.98 | 1 | 0 | phenols | antiseptic drug; disinfectant; human xenobiotic metabolite; mouse metabolite |
mercaptoethanol Mercaptoethanol: A water-soluble thiol derived from hydrogen sulfide and ethanol. It is used as a reducing agent for disulfide bonds and to protect sulfhydryl groups from oxidation. | 1.98 | 1 | 0 | alkanethiol; primary alcohol | geroprotector |
atrazine [no description available] | 2.21 | 1 | 0 | chloro-1,3,5-triazine; diamino-1,3,5-triazine | environmental contaminant; herbicide; xenobiotic |
kojic acid [no description available] | 2.03 | 1 | 0 | 4-pyranones; enol; primary alcohol | Aspergillus metabolite; EC 1.10.3.1 (catechol oxidase) inhibitor; EC 1.10.3.2 (laccase) inhibitor; EC 1.13.11.24 (quercetin 2,3-dioxygenase) inhibitor; EC 1.14.18.1 (tyrosinase) inhibitor; EC 1.4.3.3 (D-amino-acid oxidase) inhibitor; NF-kappaB inhibitor; skin lightening agent |
oxidopamine Oxidopamine: A neurotransmitter analogue that depletes noradrenergic stores in nerve endings and induces a reduction of dopamine levels in the brain. Its mechanism of action is related to the production of cytolytic free-radicals.. oxidopamine : A benzenetriol that is phenethylamine in which the hydrogens at positions 2, 4, and 5 on the phenyl ring are replaced by hydroxy groups. It occurs naturally in human urine, but is also produced as a metabolite of the drug DOPA (used for the treatment of Parkinson's disease). | 1.98 | 1 | 0 | benzenetriol; catecholamine; primary amino compound | drug metabolite; human metabolite; neurotoxin |
quinone benzoquinone : The simplest members of the class of benzoquinones, consisting of cyclohexadiene which is substituted by two oxo groups.. 1,4-benzoquinone : The simplest member of the class of 1,4-benzoquinones, obtained by the formal oxidation of hydroquinone to the corresponding diketone. It is a metabolite of benzene.. quinone : Compounds having a fully conjugated cyclic dione structure, such as that of benzoquinones, derived from aromatic compounds by conversion of an even number of -CH= groups into -C(=O)- groups with any necessary rearrangement of double bonds (polycyclic and heterocyclic analogues are included). | 7.44 | 2 | 0 | 1,4-benzoquinones | cofactor; human xenobiotic metabolite; mouse metabolite |
tyramine [no description available] | 2.81 | 3 | 0 | monoamine molecular messenger; primary amino compound; tyramines | EC 3.1.1.8 (cholinesterase) inhibitor; Escherichia coli metabolite; human metabolite; mouse metabolite; neurotransmitter |
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. | 2.6 | 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 |
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. | 2.03 | 1 | 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 | 2.92 | 4 | 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. | 5.14 | 14 | 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 |
mequinol mequinol: depigmenting agent; RN given refers to parent cpd | 1.98 | 1 | 0 | methoxybenzenes; phenols | metabolite |
4-methylcatechol [no description available] | 1.97 | 1 | 0 | methylcatechol | antioxidant; carcinogenic agent; hapten; human metabolite; plant metabolite |
cellobiose beta-cellobiose : A cellobiose with beta configuration at the reducing-end glucose residue. | 2.25 | 1 | 0 | cellobiose | epitope |
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 |
platinum Platinum: A heavy, soft, whitish metal, resembling tin, with atomic number 78, atomic weight 195.084, symbol Pt. It is used in manufacturing equipment for laboratory and industrial use. It occurs as a black powder (platinum black) and as a spongy substance (spongy platinum) and may have been known in Pliny's time as alutiae. | 2.07 | 1 | 0 | elemental platinum; nickel group element atom; platinum group metal atom | |
silver Silver: An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA. | 2.5 | 2 | 0 | copper group element atom; elemental silver | Escherichia coli metabolite |
gold Gold: A yellow metallic element with the atomic symbol Au, atomic number 79, and atomic weight 197. It is used in jewelry, goldplating of other metals, as currency, and in dental restoration. Many of its clinical applications, such as ANTIRHEUMATIC AGENTS, are in the form of its salts. | 2.55 | 2 | 0 | copper group element atom; elemental gold | |
silver chloride [no description available] | 2.07 | 1 | 0 | inorganic chloride; silver salt | |
hydroiodic acid hydrogen iodide : A diatomic molecule containing covalently bonded hydrogen and iodine atoms. | 2.11 | 1 | 0 | gas molecular entity; hydrogen halide; mononuclear parent hydride | mouse metabolite |
metaperiodate Periodic Acid: A strong oxidizing agent. | 2.02 | 1 | 0 | iodine oxoacid | |
6-hydroxydopa 6-hydroxydopa: RN given refers to cpd without isomeric designation | 1.98 | 1 | 0 | non-proteinogenic alpha-amino acid | |
5,6-dihydroxyindole [no description available] | 2.38 | 2 | 0 | dihydroxyindole | mouse metabolite |
dopachrome dopachrome: cyclization product of L-DOPA | 4.19 | 5 | 0 | orthoquinones | |
5,6-dihydroxy-2-indolylcarboxylic acid 5,6-dihydroxyindole-2-carboxylic acid : A dihydroxyindole that is indole-2-carboxylic acid substituted by hydroxy groups at positions 5 and 6. | 3.52 | 2 | 0 | dihydroxyindole | mouse metabolite |
6-hydroxydopa quinone 6-hydroxydopa quinone: structure given in first source; quinoid cofactor of quinoproteins; RN given refers to the 4-hydroxy-3,6-dioxo- tautomer. L-topaquinone : A topaquinone that has S configuration. | 2.7 | 3 | 0 | | |
glutathionyldopa glutathionyldopa: glutathione metabolite; precursor of cysteinyldopa | 2.39 | 2 | 0 | | |
hydroxyl radical Hydroxyl Radical: The univalent radical OH. Hydroxyl radical is a potent oxidizing agent. | 7.42 | 2 | 0 | oxygen hydride; oxygen radical; reactive oxygen species | |
2-s-cysteinyldopa 2-S-cysteinyl-DOPA : An L-tyrosine derivative that is L-DOPA in which the hydrogen at position 2 on the phenyl ring is replaced by a cysteinyl group. Found in the urine of patients with melanoma. | 1.97 | 1 | 0 | amino dicarboxylic acid; aryl sulfide; catechols; diamine; L-tyrosine derivative; S-conjugate; S-organyl-L-cysteine | human urinary metabolite |
leukodopachrome leukodopachrome: proposed metabolite in pathway from tyrosine to dopachrome; RN given refers to (S)-isomer; structure given in first source. leucodopachrome : Indoline substituted with hydroxy groups at C-5 and -6 and a carboxy group at C-2, and with S stereochemistry at C-2. | 1.96 | 1 | 0 | hydroxy monocarboxylic acid; indoles | metabolite |
metaperiodate metaperiodate: RN given refers to periodic acid, Na salt; structure. periodate : A monovalent inorganic anion obtained by deprotonation of periodic acid. | 2.02 | 1 | 0 | iodine oxoanion; monovalent inorganic anion | |
aminochrome 1 dopaminechrome: structure given in first source. dopaminechrome (enol form) : A member of the class of indolones that is 3,5-dihydro-2H-indole substituted by an oxo group at position 5 and a hydroxy group at position 6.. dopaminechrome (keto form) : A member of the class of indoledione that is 2,3,5,6-tetrahydro-1H-indole carrying oxo groups at positions 5 and 6; major microspecies at pH 7.3. It is an endogenous compound formed during dopamine oxidation and can induce neurotoxicity under certain aberrant conditions and induce Parkinson-like syndrome. | 2 | 1 | 0 | indoledione; orthoquinones | neurotoxin |
organophosphonates hydrogenphosphite : A divalent inorganic anion resulting from the removal of a proton from two of the hydroxy groups of phosphorous acid. | 2.01 | 1 | 0 | divalent inorganic anion; phosphite ion | |
cellulase Cellulase: An endocellulase with specificity for the hydrolysis of 1,4-beta-glucosidic linkages in CELLULOSE, lichenin, and cereal beta-glucans.. beta-cellotriose : A cellotriose with a beta-configuration at the anomeric position. | 2.25 | 1 | 0 | cellotriose | |
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. | 2.6 | 1 | 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 |
ferulic acid ferulate : A monocarboxylic acid anion obtained by the deprotonation of the carboxy group of ferulic acid. | 2.17 | 1 | 0 | ferulic acids | anti-inflammatory agent; antioxidant; apoptosis inhibitor; cardioprotective agent; MALDI matrix material; plant metabolite |
caffeic acid trans-caffeic acid : The trans-isomer of caffeic acid. | 2.17 | 1 | 0 | caffeic acid | geroprotector; mouse metabolite |
rhododendrol rhododendrol: structure in first source | 2.11 | 1 | 0 | | |
thiouracil Thiouracil: Occurs in seeds of Brassica and Crucifera species. Thiouracil has been used as antithyroid, coronary vasodilator, and in congestive heart failure although its use has been largely supplanted by other drugs. It is known to cause blood dyscrasias and suspected of terato- and carcinogenesis.. thiouracil : A nucleobase analogue that is uracil in which the oxo group at C-2 is replaced by a thioxo group. | 6.97 | 1 | 0 | nucleobase analogue; thiocarbonyl compound | antithyroid drug; metabolite |
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. | 1.98 | 1 | 0 | one-carbon compound; thioureas; ureas | antioxidant; chromophore |
1,1-diphenyl-2-picrylhydrazyl 1,1-diphenyl-2-picrylhydrazyl: A diphenyl picrate; the ability to decolorize this stable radical indicates reactivity of tested compounds (Banda, Anal Chem 46:1772-7 1974) | 2.13 | 1 | 0 | | |
feruloyltyramine feruloyltyramine: structure given in first source; isolated from Cannabis sativa seeds, roots, leaves, and resin; induces hypothermia and motor incoordination in mice; moupinamide is (E)-isomer | 2.17 | 1 | 0 | tyramines | metabolite |
ellagic acid [no description available] | 2.13 | 1 | 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 |
casein kinase ii Casein Kinase II: A ubiquitous casein kinase that is comprised of two distinct catalytic subunits and dimeric regulatory subunit. Casein kinase II has been shown to phosphorylate a large number of substrates, many of which are proteins involved in the regulation of gene expression. | 2.17 | 1 | 0 | | |
n-(4-hydroxy-beta-phenethyl)-4-hydroxycinnamide trans-N-p-coumaroyl tyramine: from the twigs of Celtis chinensis; structure in first source | 2.17 | 1 | 0 | hydroxycinnamic acid | metabolite |
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. | 9.8 | 5 | 0 | cysteinium | fundamental metabolite |
thyronines Thyronines: A group of metabolites derived from THYROXINE and TRIIODOTHYRONINE via the peripheral enzymatic removal of iodines from the thyroxine nucleus. Thyronine is the thyroxine nucleus devoid of its four iodine atoms.. thyronine : A tyrosine derivative where the phenolic hydrogen of tyrosine is substituted by 4-hydroxyphenyl. | 2.6 | 1 | 0 | thyronine | |
mocetinostat mocetinostat: undergoing phase II clinical trials for treatment of cancer. mocetinostat : A benzamide obtained by formal condensation of the carboxy group of 4-({[4-(pyridin-3-yl)pyrimidin-2-yl]amino}methyl)benzoic acid with one of the amino groups of benzene-1,2-diamine. It is an orally active and isotype-selective HDAC inhibitor which exhibits antitumour activity (IC50 = 0.15, 0.29, 1.66 and 0.59 muM for HDAC1, HDAC2, HDAC3 and HDAC11). | 1.98 | 1 | 0 | aminopyrimidine; benzamides; pyridines; secondary amino compound; secondary carboxamide; substituted aniline | antineoplastic agent; apoptosis inducer; autophagy inducer; cardioprotective agent; EC 3.5.1.98 (histone deacetylase) inhibitor; hepatotoxic agent |
aluminum oxide Aluminum Oxide: An oxide of aluminum, occurring in nature as various minerals such as bauxite, corundum, etc. It is used as an adsorbent, desiccating agent, and catalyst, and in the manufacture of dental cements and refractories. | 2.03 | 1 | 0 | | |
n-caffeoyltyramine N-caffeoyltyramine: structure in first source | 2.03 | 1 | 0 | catechols | |
acid phosphatase Acid Phosphatase: An enzyme that catalyzes the conversion of an orthophosphoric monoester and water to an alcohol and orthophosphate. EC 3.1.3.2. | 2.17 | 1 | 0 | | |
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. | 5.45 | 8 | 0 | catecholamine; zwitterion | |
nad NAD(1-) : An anionic form of nicotinamide adenine dinucleotide arising from deprotonation of the two OH groups of the diphosphate moiety. | 2.05 | 1 | 0 | organophosphate oxoanion | cofactor; human metabolite; hydrogen acceptor; Saccharomyces cerevisiae metabolite |
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. | 2.17 | 1 | 0 | ascorbic acid; vitamin C | coenzyme; cofactor; flour treatment agent; food antioxidant; food colour retention agent; geroprotector; plant metabolite; skin lightening agent |
ascorbate-2-phosphate ascorbate-2-phosphate: inhibitor of ascorbate-2-sulfate sulfohydrolase from bovine liver. L-ascorbic acid 2-phosphate : An aldonolactone phosphate that is the 2-phosphate ester of L-ascorbic acid. It can stimulate collagen formation. | 2.17 | 1 | 0 | aldonolactone phosphate | |