| BT | 1,4-Benzothiazine |
| BTCA | 1,4-Benzothiazine-3-carboxylic acid |
| BQ | Dihydro-1,4-benzothiazine-6,7-dione |
| BZ | Benzothiazole |
| CD quinone | Cysteinyldopaquinone |
| DBL | 3,4-Dihydroxybenzalacetone |
| DCT | Dopachrome tautomerase, Tyrp2 |
| DHBA | 3,4-Dihydroxybenzoic acid |
| DHBAlc | 3,4-Dihydroxybenzylalcohol |
| DHBAld | 3,4-dihydroxybenzaldehyde |
| DHBTCA | Dihydro-1,4-benzothiazine-3-carboxylic acid |
| DHI | 5,6-Dihydroxyindole |
| DHICA | 5,6-Dihydroxyindole-2-carboxylic acid |
| Dihydrocaffeic acid | 3-(3,4-Dihydroxyphenyl)propionic acid |
| DOMA | 3,4-Dihydromandelic acid |
| DOPAC | 3,4-Dihydroxyphenylacetic acid |
| DOPAL | 3,4-Dihydroxybenzaldehyde |
| DOPE | 3,4-Dihydroxyphenylethanol |
| DOPEG | 3,4-Dihydroxyphenylethyleneglycol |
| DQ | Dopaquinone |
| NAC | N-Acetylcysteine |
| ODHBT | 3-Oxo-3,4-dihydro-1,4-benzothiazine |
| 4SCAP | 4-S-Cysteaminylphenol |
| 2SCD | 2-S-cysteinyldopa |
| 5SCD | 5-S-cysteinyldopa |