| MMDBr0000068 | 3-Hydroxypropionyl-CoA | Hydroxypropionic acid | | 3-Hydroxyisobutyryl-Coenzyme A Hydrolase | Beta-Alanine metabolism | | 1166 | VMH: 3HPCOAHYD |
| MMDBr0000069 | Hydroxypropionic acid | Hydrogen Ion | | 3-Hydroxypropionate Dehydrogenase | Propanoate metabolism | | 1191 | VMH: 3HPPD |
| MMDBr0000070 | Hydrogen Ion | 3-Hydroxykynurenamine | dopa decarboxylase (aromatic L-amino acid decarboxylase) | 3-Hydroxykynurenamine Decarboxy-Lyase | Tryptophan metabolism | | 1 | VMH: 3HXKYNDCL |
| MMDBr0000071 | 3-Hydroxykynurenamine | Quinoline-4,8-diol | monoamine oxidase A | 3-Hydroxykynurenamine:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tryptophan metabolism | | 1 | VMH: 3HXKYNOXDA |
| MMDBr0000072 | Homovanillin | Hydrogen Ion | aldehyde dehydrogenase 1 family, member A3 | 3-Methoxy-4-Hydroxyphenylacetaldehyde:NAD+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 3M4HDXPAC |
| MMDBr0000073 | Methylimidazoleacetic acid | Methylimidazoleacetic acid | | 3Mlda Extracellular Transport via Diffusion | Transport, extracellular | | 1 | VMH: 3MLDAt |
| MMDBr0000074 | alpha-Ketoisovaleric acid | alpha-Ketoisovaleric acid | | 3-Methyl-2-Oxobutanoate Mitochondrial Transport via Proton Symport | Transport, mitochondrial | | 1 | VMH: 3MOBt2im |
| MMDBr0000075 | 3-Methyl-2-oxovaleric acid | 3-Methyl-2-oxovaleric acid | | 3-Methyl-2-Oxopentanoate Mitochondrial Transport via Proton Symport | Transport, mitochondrial | | 1 | VMH: 3MOPt2im |
| MMDBr0000076 | 3-Methoxy-4-hydroxyphenylglycolaldehyde | Vanillylmandelic acid | aldehyde dehydrogenase 1 family, member A3 | 3-Methoxy-4-Hydroxyphenylglycolaldehyde:NAD+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 3MOX4HOXPGALDOX |
| MMDBr0000077 | 3-Methoxy-4-hydroxyphenylglycolaldehyde | Vanillylmandelic acid | aldehyde dehydrogenase 1 family, member A3 | 3-Methoxy-4-Hydroxyphenylglycolaldehyde:NADP+ Oxidoreductase | Tyrosine metabolism | | 1 | VMH: 3MOX4HOXPGALDOX_NADP_ |
| MMDBr0000078 | 3-Methoxytyramine | Homovanillin | monoamine oxidase A | 3-Methoxytyramine:Oxygen Oxidoreductase (Deaminating) | Tyrosine metabolism | | 1 | KEGG: R04890; VMH: 3MOXTYROX |
| MMDBr0000079 | 3'-AMP | Adenosine | acid phosphatase 2, lysosomal | 3'-Nucleotidase (AMP), Lysosomal | Purine catabolism | | 1 | VMH: 3NTD7l |
| MMDBr0000080 | 3-Sulfinoalanine | 3-Sulfinoalanine | solute carrier family 25 (aspartate/glutamate carrier), member 12 | Cysteinesulfinate-Aspartate Mitochondrial Shuttle | Transport, mitochondrial | | 1 | VMH: 3SALAASPm |
| MMDBr0000081 | 3-Sulfinoalanine | Carbon dioxide | cysteine sulfinic acid decarboxylase | 3-Sulfino-L-Alanine Carboxy-Lyase | Taurine and hypotaurine metabolism | | 1 | VMH: 3SALACBOXL |
| MMDBr0000082 | 3-Sulfinoalanine | Cysteic acid | | Cysteinesulfinic Acid Oxidase | Taurine and hypotaurine metabolism | | 1 | VMH: 3SALAOX |
| MMDBr0000083 | 3-Sulfinoalanine | 3-Sulfinylpyruvic acid | glutamic-oxaloacetic transaminase 1, soluble | 3-Sulfino-Alanine Transaminase (Irreversible) | Methionine and cysteine metabolism | | 1 | VMH: 3SALATAi |
| MMDBr0000084 | 3-Sulfinoalanine | 3-Sulfinylpyruvic acid | glutamic-oxaloacetic transaminase 2, mitochondrial | 3-Sulfino-Alanine Transaminase (Irreversible), Mitochondrial | Methionine and cysteine metabolism | | 1 | VMH: 3SALATAim |
| MMDBr0000085 | 3-Sulfinylpyruvic acid | Hydrogen Ion | | 3-Sulfinopyruvate Hydrolase (Spotaneous Reaction) | Methionine and cysteine metabolism | | 1 | VMH: 3SPYRSP |
| MMDBr0000086 | 3-Sulfinylpyruvic acid | Hydrogen Ion | | 3-Sulfinopyruvate Hydrolase (Spotaneous Reaction), Mitochondrial | Methionine and cysteine metabolism | | 1 | VMH: 3SPYRSPm |
| MMDBr0000087 | Epinephrine | 3,4-Dihydroxymandelaldehyde | monoamine oxidase A | 4-[ (1R)-1-Hydroxy-2- (Methylamino)Ethyl]-1, 2-Benzenediol:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tyrosine metabolism | | 1 | VMH: 41R1H2MAE12BOOX |
| MMDBr0000088 | Water | 3,4-Dihydroxymandelaldehyde | monoamine oxidase A | 4-[ (1R)-2-Amino-1-Hydroxyethyl]-1, 2-Benzenediol:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tyrosine metabolism | | 1 | KEGG: R02532; VMH: 41R2A1H12BOOX |
| MMDBr0000089 | Dopamine | 3,4-Dihydroxyphenylacetaldehyde | | 4- (2-Aminoethyl)-1, 2-Benzenediol:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tyrosine metabolism | | 1166 | KEGG: R04300; VMH: 42A12BOOX |
| MMDBr0000090 | gamma-Aminobutyric acid | gamma-Aminobutyric acid | | 4-Aminobutanoate Mitochondrial Transport via Diffusion | Transport, mitochondrial | | 1 | VMH: 4ABUTtm |
| MMDBr0000091 | Coenzyme A | 4-hydroxybenzoyl-CoA | | 4-Hydroxybenzoyl Coenzyme A Formation | Ubiquinone synthesis | | 1 | KEGG: R08767; VMH: 4HBZCOAFm |
| MMDBr0000092 | 4-hydroxybenzoyl-CoA | 4-Hydroxybenzoic acid | | 4-Hydroxybenzoate Formation | Ubiquinone synthesis | | 1 | KEGG: R01301; VMH: 4HBZFm |
