| MMDBr0000094 | L-4-hydroxyglutamic semialdehyde | L-Glutamyl-tRNA(Glu) | aldehyde dehydrogenase 4 family, member A1 | L-4-Hydroxyglutamate Semialdehyde Dehydrogenase, Mitochondrial | Arginine and proline metabolism | | 1 | KEGG; VMH |
| MMDBr0000095 | 4-Hydroxyphenylacetaldehyde | p-Hydroxyphenylacetic acid | | 4-Hydroxyphenylacetaldehyde:NADP+ Oxidoreductase | Tyrosine metabolism | | 1470 | VMH |
| MMDBr0000096 | Ketoleucine | Ketoleucine | | 4-Methyl-2-Oxopentanoate Mitochondrial Transport via Proton Symport | Transport, mitochondrial | | 1 | VMH |
| MMDBr0000102 | 4-Nitrophenol | 4-Nitrophenyl sulfate | sulfotransferase family, cytosolic, 1A, phenol-preferring, member 1 | 4-Nitrophenol Sulfotransferase | Cytochrome metabolism | | 1 | VMH |
| MMDBr0000103 | 4-Nitrophenol | 4-Nitrophenol | | Transport of Xenobiotic | Transport, extracellular | | 1 | VMH |
| MMDBr0000104 | 4-Pyridoxic acid | 4-Pyridoxic acid | | 4-Pyridoxal Secretion | Transport, extracellular | | 1 | VMH |
| MMDBr0000105 | 5-alpha-Dihydrotestosterone glucuronide | 5-alpha-Dihydrotestosterone glucuronide | ATP-binding cassette, sub-family C (CFTR/MRP), member 1 | Glucuronidated Compound Transport | Transport, extracellular | | 1 | VMH |
| MMDBr0000108 | Dihydrotestosterone | 5a-Dihydrotestosterone sulfate | sulfotransferase family, cytosolic, 1A, phenol-preferring, member 3 | 5Alpha-Dihydrotestosterone Sulfotransferase | Steroid metabolism | | 1 | VMH |
| MMDBr0000111 | 5-Aminolevulinic acid | 5-Aminolevulinic acid | | 5-Aminolevulinate Mitochondrial Transport | Heme synthesis | | 1 | VMH |
| MMDBr0000113 | Folinic acid | Folinic acid | solute carrier family 19 (folate transporter), member 1 | 5-Formyltetrahydrofolate Transport via Anion Exchange | Transport, extracellular | | 1 | VMH |
| MMDBr0000114 | 5-Hydroxy-L-tryptophan | Carbon dioxide | | 5-Hydroxy-L-Tryptophan Decarboxy-Lyase | Tryptophan metabolism | | 1166 | VMH |
| MMDBr0000116 | 5-Hydroxyindoleacetaldehyde | 5-Hydroxyindoleacetic acid | aldehyde oxidase 1 | 5-Hydroxyindoleacetaldehyde:Oxygen Oxidoreductase | Tryptophan metabolism | | 1 | VMH |
| MMDBr0000117 | 5-Hydroxyindoleacetaldehyde | 5-Hydroxyindoleacetic acid | aldehyde dehydrogenase 1 family, member B1 | 5-Hydroxyindoleacetaldehyde:NAD+ Oxidoreductase, Mitochondrial | Tryptophan metabolism | | 1 | VMH |
| MMDBr0000118 | Water | 5-Hydroxyindoleacetaldehyde | monoamine oxidase A | 5-Hydroxytryptamine:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tryptophan metabolism | | 1 | KEGG; VMH |
| MMDBr0000119 | 5-Hydroxy-L-tryptophan | 5-Hydroxy-N-formylkynurenine | indoleamine 2,3-dioxygenase 1 | 5-Hydroxy-L-Tryptophan:Oxygen 2, 3-Dioxygenase (Indole-Decyclizing) | Tryptophan metabolism | | 1 | VMH |
| MMDBr0000120 | 5-Hydroxy-L-tryptophan | 5-Hydroxy-L-tryptophan | solute carrier family 18 (vesicular monoamine transporter), member 1 | 5-Hydroxy-L-Tryptophan Secretion via Secretory Vesicle (ATP Driven) | Transport, extracellular | | 1 | VMH |
| MMDBr0000121 | 5-Hydroxykynurenine | 5-Hydroxykynurenamine | | 5-Hydroxykynurenamine Decarboxy-Lyase | Tryptophan metabolism | | 1166 | VMH |
| MMDBr0000122 | 5-Hydroxykynurenamine | 4,6-Dihydroxyquinoline | monoamine oxidase A | 5-Hydroxykynurenamine:Oxygen Oxidoreductase (Deaminating) (Flavin-Containing) | Tryptophan metabolism | | 1 | VMH |
| MMDBr0000123 | 5-Methyltetrahydrofolic acid | 5-Methyltetrahydrofolic acid | folate receptor 1 (adult) | 5-Methyltetrahydrofolate Transport via Receptor Binding And Protolysis | Transport, extracellular | | 1 | VMH |
| MMDBr0000124 | 5-Methyltetrahydrofolic acid | 5-Methyltetrahydrofolic acid | solute carrier family 19 (folate transporter), member 1 | 5-Methyltetrahydrofolate Transport via Anion Exchange | Transport, extracellular | | 1 | VMH |
| MMDBr0000125 | Pentaglutamyl Folate (Thf) | Pentaglutamyl Folate (Thf) | | 5-Glutamyl-Thf Transport, Lysosomal | Transport, lysosomal | | 1 | VMH |
| MMDBr0000126 | Pentaglutamyl Folate (Thf) | Pentaglutamyl Folate (Thf) | | 5-Glutamyl-Thf Transport, M Mitochondrial | Transport, mitochondrial | | 1 | VMH |
| MMDBr0000133 | 7-Dehydrocholesterol | 7-Dehydrocholesterol | | Cholesterol Precursor Intracellular Transport | Transport, endoplasmic reticular | | 1 | VMH |
| MMDBr0000138 | Water | D-Mannose | mannosidase, alpha, class 2C, member 1 | Alpha-Mannosidase | N-glycan degradation | | 1 | VMH |
| MMDBr0000139 | Water | D-Mannose | mannosidase, alpha, class 2B, member 1 | Alpha-Mannosidase, Lysosomal | N-glycan degradation | | 1 | VMH |
