| Substance | Relationship Strength | Studies | Trials | Classes | Roles |
|---|
3-hydroxykynurenine
3-hydroxykynurenine: RN given refers to cpd without isomeric designation. 3-hydroxykynurenine : A hydroxykynurenine that is kynurenine substituted by a hydroxy group at position 3.. hydroxykynurenine : A hydroxy-amino acid that is kynurenine substituted by a single hydroxy group at unspecified position. A "closed" class. | 1.97 | 1 | 0 | hydroxykynurenine | human metabolite |
choline
[no description available] | 1.96 | 1 | 0 | cholines | allergen;
Daphnia magna metabolite;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
neurotransmitter;
nutrient;
plant metabolite;
Saccharomyces cerevisiae metabolite |
n(1)-methylnicotinamide
N(1)-methylnicotinamide: RN given refers to parent cpd. 1-methylnicotinamide : A pyridinium ion comprising nicotinamide having a methyl group at the 1-position. It is a metabolite of nicotinamide which was initially considered to be biologically inactive but has emerged as an anti-thrombotic and anti-inflammatory agent. | 3.26 | 6 | 0 | pyridinium ion | algal metabolite;
anti-inflammatory agent;
human urinary metabolite;
mouse metabolite;
plant metabolite;
Saccharomyces cerevisiae metabolite |
kynurenine
Kynurenine: A metabolite of the essential amino acid tryptophan metabolized via the tryptophan-kynurenine pathway.. kynurenine : A ketone that is alanine in which one of the methyl hydrogens is substituted by a 2-aminobenzoyl group. | 1.97 | 1 | 0 | aromatic ketone;
non-proteinogenic alpha-amino acid;
substituted aniline | human metabolite |
niacinamide
nicotinamide : A pyridinecarboxamide that is pyridine in which the hydrogen at position 3 is replaced by a carboxamide group. | 6.33 | 21 | 2 | pyridine alkaloid;
pyridinecarboxamide;
vitamin B3 | anti-inflammatory agent;
antioxidant;
cofactor;
EC 2.4.2.30 (NAD(+) ADP-ribosyltransferase) inhibitor;
EC 3.5.1.98 (histone deacetylase) inhibitor;
Escherichia coli metabolite;
geroprotector;
human urinary metabolite;
metabolite;
mouse metabolite;
neuroprotective agent;
Saccharomyces cerevisiae metabolite;
Sir2 inhibitor |
niacin
Niacin: A water-soluble vitamin of the B complex occurring in various animal and plant tissues. It is required by the body for the formation of coenzymes NAD and NADP. It has PELLAGRA-curative, vasodilating, and antilipemic properties.. vitamin B3 : Any member of a group of vitamers that belong to the chemical structural class called pyridines that exhibit biological activity against vitamin B3 deficiency. Vitamin B3 deficiency causes a condition known as pellagra whose symptoms include depression, dermatitis and diarrhea. The vitamers include nicotinic acid and nicotinamide (and their ionized and salt forms).. nicotinic acid : A pyridinemonocarboxylic acid that is pyridine in which the hydrogen at position 3 is replaced by a carboxy group. | 10.54 | 9 | 2 | pyridine alkaloid;
pyridinemonocarboxylic acid;
vitamin B3 | antidote;
antilipemic drug;
EC 3.5.1.19 (nicotinamidase) inhibitor;
Escherichia coli metabolite;
human urinary metabolite;
metabolite;
mouse metabolite;
plant metabolite;
vasodilator agent |
pyridoxine
4,5-bis(hydroxymethyl)-2-methylpyridin-3-ol: structure in first source. vitamin B6 : Any member of the group of pyridines that exhibit biological activity against vitamin B6 deficiency. Vitamin B6 deficiency is associated with microcytic anemia, electroencephalographic abnormalities, dermatitis with cheilosis (scaling on the lips and cracks at the corners of the mouth) and glossitis (swollen tongue), depression and confusion, and weakened immune function. Vitamin B6 consists of the vitamers pyridoxine, pyridoxal, and pyridoxamine and their respective 5'-phosphate esters (and includes their corresponding ionized and salt forms). | 1.95 | 1 | 0 | hydroxymethylpyridine;
methylpyridines;
monohydroxypyridine;
vitamin B6 | cofactor;
Escherichia coli metabolite;
human metabolite;
mouse metabolite;
Saccharomyces cerevisiae metabolite |
quinolinic acid
Quinolinic Acid: A metabolite of tryptophan with a possible role in neurodegenerative disorders. Elevated CSF levels of quinolinic acid are correlated with the severity of neuropsychological deficits in patients who have AIDS.. pyridinedicarboxylic acid : Any member of the class of pyridines carrying two carboxy groups.. quinolinic acid : A pyridinedicarboxylic acid that is pyridine substituted by carboxy groups at positions 2 and 3. It is a metabolite of tryptophan. | 2.08 | 1 | 0 | pyridinedicarboxylic acid | Escherichia coli metabolite;
human metabolite;
mouse metabolite;
NMDA receptor agonist |
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. | 2.39 | 2 | 0 | indole-3-acetic acids | drug metabolite;
human metabolite;
mouse metabolite |
kynurenic acid
Kynurenic Acid: A broad-spectrum excitatory amino acid antagonist used as a research tool.. kynurenic acid : A quinolinemonocarboxylic acid that is quinoline-2-carboxylic acid substituted by a hydroxy group at C-4. | 2.39 | 2 | 0 | monohydroxyquinoline;
quinolinemonocarboxylic acid | G-protein-coupled receptor agonist;
human metabolite;
neuroprotective agent;
nicotinic antagonist;
NMDA receptor antagonist;
Saccharomyces cerevisiae metabolite |
xanthurenic acid
xanthurenic acid : A quinolinemonocarboxylic acid that is quinoline-2-carboxylic acid substituted by hydroxy groups at C-4 and C-8. | 2.39 | 2 | 0 | dihydroxyquinoline;
quinolinemonocarboxylic acid | animal metabolite;
iron chelator;
metabotropic glutamate receptor agonist;
vesicular glutamate transport inhibitor |
estrone
Hydroxyestrones: Estrone derivatives substituted with one or more hydroxyl groups in any position. They are important metabolites of estrone and other estrogens. | 1.99 | 1 | 0 | 17-oxo steroid;
3-hydroxy steroid;
phenolic steroid;
phenols | antineoplastic agent;
bone density conservation agent;
estrogen;
human metabolite;
mouse metabolite |
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. | 1.95 | 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 |
tryptophan
Tryptophan: An essential amino acid that is necessary for normal growth in infants and for NITROGEN balance in adults. It is a precursor of INDOLE ALKALOIDS in plants. It is a precursor of SEROTONIN (hence its use as an antidepressant and sleep aid). It can be a precursor to NIACIN, albeit inefficiently, in mammals.. tryptophan : An alpha-amino acid that is alanine bearing an indol-3-yl substituent at position 3. | 4.76 | 7 | 1 | erythrose 4-phosphate/phosphoenolpyruvate family amino acid;
L-alpha-amino acid zwitterion;
L-alpha-amino acid;
proteinogenic amino acid;
tryptophan zwitterion;
tryptophan | antidepressant;
Escherichia coli metabolite;
human metabolite;
micronutrient;
mouse metabolite;
nutraceutical;
plant metabolite;
Saccharomyces cerevisiae metabolite |
malondialdehyde
Malondialdehyde: The dialdehyde of malonic acid.. malonaldehyde : A dialdehyde that is propane substituted by two oxo groups at the terminal carbon atoms respectively. A biomarker of oxidative damage to lipids caused by smoking, it exists in vivo mainly in the enol form. | 2.03 | 1 | 0 | dialdehyde | biomarker |
n-methylnicotinamide
N-methylnicotinamide: structure. N-methylnicotinamide : A pyridinecarboxamide that is nicotinamide in which one of the amide hydrogens is substituted by a methyl group. | 10.32 | 7 | 2 | pyridinecarboxamide | metabolite |
nicotinuric acid
nicotinuric acid: RN given refers to parent cpd. N-nicotinoylglycine : An N-acylglycine having nicotinoyl as the acyl substituent. | 4.09 | 3 | 1 | N-acylglycine | human urinary metabolite |
n'-methyl-2-pyridone-5-carboxamide
N'-methyl-2-pyridone-5-carboxamide: structure. N-methyl-6-pyridone-3-carboxamide : A pyridone that is 2-pyridone substituted with a carboxamide group at C-5 and a methyl group at N-1. | 10.27 | 12 | 1 | methylpyridines;
pyridinecarboxamide;
pyridone | metabolite;
mouse metabolite |
nicotinamide n-oxide
[no description available] | 4.33 | 4 | 1 | pyridines | |
n(1)-methyl-2-pyridone-5-carboxylic acid
[no description available] | 2.01 | 1 | 0 | | |
nad
NAD(1-) : An anionic form of nicotinamide adenine dinucleotide arising from deprotonation of the two OH groups of the diphosphate moiety. | 2.46 | 2 | 0 | organophosphate oxoanion | cofactor;
human metabolite;
hydrogen acceptor;
Saccharomyces cerevisiae metabolite |
caseins
Caseins: A mixture of related phosphoproteins occurring in milk and cheese. The group is characterized as one of the most nutritive milk proteins, containing all of the common amino acids and rich in the essential ones. | 1.99 | 1 | 0 | | |