| FAD |
| Acetyl-CoA |
| L-Tryptophan |
| Anthranilate |
| 2-Oxoadipate |
| L-Kynurenine |
| Indolepyruvate |
| Acetoacetyl-CoA |
| Tryptamine |
| Indole |
| Glutaryl-CoA |
| 3-Hydroxyanthranilate |
| Indole-3-acetaldehyde |
| 5-Hydroxy-L-tryptophan |
| Serotonin |
| Crotonoyl-CoA |
| Indole-3-acetate |
| Indole-3-ethanol |
| N-Acetylserotonin |
| 7,8-Dihydroxykynurenate |
| (S)-3-Hydroxybutanoyl-CoA |
| 7,8-Dihydro-7,8-dihydroxykynurenate |
| 4-(2-Aminophenyl)-2,4-dioxobutanoate |
| FADH2 |
| Melatonin |
| 4-Hydroxy-2-quinolinecarboxylic acid |
| 2-Aminophenol |
| Indolelactate |
| 2-Aminophenoxazin-3-one |
| N-Acetylisatin |
| 2-Aminomuconate |
| N-Acetylindoxyl |
| Xanthurenic acid |
| (Indol-3-yl)acetamide |
| L-Formylkynurenine |
| 2,3-Dihydroxyindole |
| Indole-3-acetaldehyde oxime |
| 3-Indoleacetonitrile |
| 3-Hydroxy-L-kynurenine |
| (Indol-3-yl)glycolaldehyde |
| gamma-Oxalocrotonate |
| 2-Formylaminobenzaldehyde |
| Quinolinate |
| 2-Aminomuconate semialdehyde |
| 2-Amino-3-carboxymuconate semialdehyde |
| 5-Hydroxyindoleacetaldehyde |
| 5-Hydroxyindoleacetate |
| 3-Hydroxykynurenamine |
| 4,8-Dihydroxyquinoline |
| 5-Hydroxykynurenamine |
| 4,6-Dihydroxyquinoline |
| Cinnavalininate |
| 5-(3'-Carboxy-3'-oxopropenyl)-4,6-dihydroxypicolinate |
| Formyl-N-acetyl-5-methoxykynurenamine |
| 6-Hydroxymelatonin |
| 3-Methylindolepyruvate |
| 4-(2-Amino-3-hydroxyphenyl)-2,4-dioxobutanoate |
| 5-Hydroxyindolepyruvate |
| Formyl-5-hydroxykynurenamine |
| 5-Hydroxy-N-formylkynurenine |
| 5-Hydroxykynurenine |
| 4-(2-Amino-5-hydroxyphenyl)-2,4-dioxobutanoate |
| Formylanthranilate |
| 5-(2'-Formylethyl)-4,6-dihydroxypicolinate |
| 5-(2'-Carboxyethyl)-4,6-dihydroxypicolinate |
| 5-(3'-Carboxy-3'-oxopropyl)-4,6-dihydroxypicolinate |
| Indoxyl |
| 5-Methoxytryptamine |
| 5-Methoxyindoleacetate |
| 6-Hydroxykynurenate |
| 8-Methoxykynurenate |
| 3-Methoxyanthranilate |
| 5-Hydroxyindoleacetylglycine |
| 3-Methyldioxyindole |
| 2-Formaminobenzoylacetate |
| Glucobrassicin |
| N-Methylserotonin |
| N-Methyltryptamine |
| Indolylmethylthiohydroximate |
| Indolylmethyl-desulfoglucosinolate |
| S-(Indolylmethylthiohydroximoyl)-L-cysteine |
| N-Hydroxyl-tryptamine |