| MMDBr0000043 | Hydrogen carbonate | Hydrogen carbonate | solute carrier family 4 (sodium bicarbonate cotransporter), member 4 | Bicarbonate Transport (Na/Hco3 1:2 Symport) | Transport, extracellular | | 1 | VMH: 2HCO3_NAt |
| MMDBr0000044 | 2-Methylcitric acid | 2-Methylcitric acid | | 2-Methylcitrate Transport via Diffusion | Transport, extracellular | | 1 | VMH: 2MCITt |
| MMDBr0000045 | Oxoadipic acid | Carbon dioxide | dihydrolipoamide dehydrogenase | 2-Oxoadipate:Lipoamde 2-Oxidoreductase (Decarboxylating And Acceptor-Succinylating), Mitochondrial | Lysine metabolism | | 1 | KEGG: R01933; VMH: 2OXOADOXm |
| MMDBr0000046 | Oxoadipic acid | Oxoadipic acid | solute carrier family 25 (mitochondrial oxoadipate carrier), member 21 | 2-Oxoadipate Shuttle (Cytosol/Mitochondria) | Tryptophan metabolism | | 1 | VMH: 2OXOADPTm |
| MMDBr0000047 | 3,4-Dihydroxymandelaldehyde | 3,4-Dihydroxyphenylglycol | | 3, 4-Dihydroxyphenylethyleneglycol:NAD+ Oxidoreductase | Tyrosine metabolism | | 1166 | KEGG: R04880; VMH: 34DHOXPEGOX |
| MMDBr0000048 | 3,4-Dihydroxyphenylglycol | 3,4-Dihydroxyphenylglycol | | 3, 4-Dihydroxyphenylethyleneglycol Transport (Diffusion) | Transport, extracellular | | 1 | VMH: 34DHOXPEGt |
| MMDBr0000049 | 3,4-Dihydroxybenzeneacetic acid | S-Adenosylhomocysteine | catechol-O-methyltransferase | 3, 4-Dihydroxyphenylacetate:Amet O-Methyltransferase | Tyrosine metabolism | | 1 | VMH: 34DHPHAMT |
| MMDBr0000050 | L-Dopa | L-Dopa | solute carrier family 16 (aromatic amino acid transporter), member 10 | 3, 4-Dihydroxy-L-Phenylalanine Transport | Transport, extracellular | | 1 | VMH: 34DHPHEt |
| MMDBr0000051 | 3,4-Dihydroxyphenylacetaldehyde | 3,4-Dihydroxybenzeneacetic acid | aldehyde dehydrogenase 1 family, member A3 | 3, 4-Dihydroxyphenylacetaldehyde:NAD+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 34DHPLACOX |
| MMDBr0000052 | 3,4-Dihydroxyphenylacetaldehyde | 3,4-Dihydroxybenzeneacetic acid | aldehyde dehydrogenase 3 family, member A1 | 3, 4-Dihydroxyphenylacetaldehyde:NADP+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 34DHPLACOX_NADP_ |
| MMDBr0000053 | 3,4-Dihydroxymandelaldehyde | 3,4-Dihydroxymandelic acid | aldehyde dehydrogenase 1 family, member A3 | 3, 4-Dihydroxymandelaldehyde:NAD+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 34DHXMANDACOX |
| MMDBr0000054 | 3,4-Dihydroxymandelaldehyde | 3,4-Dihydroxymandelic acid | aldehyde dehydrogenase 3 family, member B1 | 3, 4-Dihydroxymandelaldehyde:NADP+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 34DHXMANDACOX_NADP_ |
| MMDBr0000055 | 4-Hydroxyphenylpyruvic acid | Hydroxyphenyllactic acid | | 3- (4-Hydroxyphenyl-)Lactate Formation | Ubiquinone synthesis | | 1 | KEGG: R03336; VMH: 34HPLFM |
| MMDBr0000056 | 4-Hydroxyphenylpyruvic acid | Carbon dioxide | | 4-Hydroxyphenylpyruvate:Oxygen Oxidoreductase | Tyrosine metabolism | | 1166 | KEGG: R02521; VMH: 34HPPOR |
| MMDBr0000057 | Cyclic GMP | Cyclic GMP | | 35CGMP Nuclear Transport | Transport, nuclear | | 1 | VMH: 35CGMPtn |
| MMDBr0000058 | 2-Methyl-3-oxopropanoic acid | (S)-b-aminoisobutyric acid | 4-aminobutyrate aminotransferase | L-3-Aminoisobutyrate Transaminase, Mitochondrial | Valine, leucine, and isoleucine metabolism | | 1 | VMH: 3AIBTm |
| MMDBr0000059 | (S)-b-aminoisobutyric acid | (S)-b-aminoisobutyric acid | 4-aminobutyrate aminotransferase | 3-Amino-Isobutyrate Transport, Mitochondrial | Transport, mitochondrial | | 1 | VMH: 3AIBtmi |
| MMDBr0000060 | 3-Decaprenyl-4-Hydroxybenzoate | 3,4-dihydroxy-5-all-trans-decaprenylbenzoate | | Hydroxylation of 3-Decaprenyl-4-Hydroxybenzoate (NADH) | Ubiquinone synthesis | | 1 | VMH: 3DPHBH1 |
| MMDBr0000061 | 3-Decaprenyl-4-Hydroxybenzoate | 3,4-dihydroxy-5-all-trans-decaprenylbenzoate | | Hydroxylation of 3-Decaprenyl-4-Hydroxybenzoate (NADPH) | Ubiquinone synthesis | | 1 | VMH: 3DPHBH2 |
| MMDBr0000062 | 3-Dehydrosphinganine | NADP | 3-ketodihydrosphingosine reductase | 3-Dehydrosphinganine Reductase | Sphingolipid metabolism | | 1 | KEGG: R02978; VMH: 3DSPHR |
| MMDBr0000063 | 3-Hydroxyanthranilic acid | 2-Amino-3-carboxymuconic acid semialdehyde | | 3-Hydroxyanthranilate 3, 4-Dioxygenase | Tryptophan metabolism | | 1166 | KEGG: R02665; VMH: 3HAO |
| MMDBr0000064 | Crotonoyl-CoA | 3-Hydroxybutyryl-CoA | enoyl CoA hydratase domain containing 2 | 3-Hydroxybutyryl Coenzyme A Dehydratase, Mitochondrial | Butanoate metabolism | | 1 | VMH: 3HBCDm |
| MMDBr0000065 | (S)-3-Hydroxyisobutyryl-CoA | (S)-3-Hydroxyisobutyric acid | | 3-Hydroxyisobutyryl Coenzyme A Hydrolase, Mitochondrial | Valine, leucine, and isoleucine metabolism | | 1 | VMH: 3HBCOAHLm |
| MMDBr0000066 | Oxoglutaric acid | 4-(2-Amino-3-hydroxyphenyl)-2,4-dioxobutanoic acid | aminoadipate aminotransferase | 3-Hydroxy-L-Kynurenine:2-Oxoglutarate Aminotransferase | Tryptophan metabolism | | 1 | VMH: 3HKYNAKGAT |
| MMDBr0000067 | L-Dopa | Carbon dioxide | | 3-Hydroxy-L-Tyrosine Carboxy-Lyase | Tyrosine metabolism | | 1166 | VMH: 3HLYTCL |
