| DL-Lysine 50% | 70-54-2 | Intermediates | 0 |
| DL-Methylephedrine | 1201-56-5 | Alkalinizing agents | 0 |
| DL-alpha tocopheryl acetate | 52225-20-4 | | 0 |
| DL-dimyristoylphosphatidylcholine | 18656-38-7 | Gastrointestinal Agents | 0 |
| DL-dimyristoylphosphatidylglycerol | 61361-72-6 | Gastrointestinal Agents | 0 |
| Diphosphate | 2466-09-3 | | 0 |
| Diphthamide | 75645-22-6 | | 0 |
| Dipicolinic acid | 499-83-2 | Enzyme Replacements/modifiers | 0 |
| Dipipanone | 467-83-4 | | 0 |
| Dipraglurant | 872363-17-2 | | 0 |
| Diprenorphine | 14357-78-9 | Central Nervous System Agents | 0 |
| Dipropyl-4-hydroxytryptamine | 63065-88-3 | | 0 |
| Dipropylene glycol | 25265-71-8 | | 0 |
| Dipyrithione | 3696-28-4 | Anti-infective Agents | 0 |
| Dipyrocetyl | 486-79-3 | Analgesics | 0 |
| Diquafosol | 59985-21-6 | Electrolytes | 0 |
| Diridavumab | 1393659-46-5 | Other substances | 0 |
| Dirloctocogene samoparvovec | 2163074-23-3 | | 0 |
| Dirlotapide | 481658-94-0 | Other substances | 0 |
| Dirocaftor | 2137932-23-9 | | 0 |
| Dirucotide | 152074-97-0 | Other substances | 0 |
| Disitamab vedotin | 2136633-23-1 | Other substances | 0 |
| Disitertide | 272105-42-7 | Other substances | 0 |
| Disomotide | 181477-43-0 | Anticancer drugs | 0 |
| Distearyldimonium | 14357-21-2 | Anti-infective Agents | 0 |
| Distigmine | 17299-00-2 | Central Nervous System Agents | 0 |
| Disufenton | 168021-77-0 | Antioxidants | 0 |
| Ditazole | 18471-20-0 | | 0 |
| Dithiane Diol | 16096-98-3 | | 0 |
| Dithiazanine | 7187-55-5 | Anti-infective Agents | 0 |
| Dithioerythritol | 6892-68-8 | | 0 |
| Dithiopyr | 97886-45-8 | | 0 |
| Ditiocarb zinc | 14324-55-1 | Antidotes, Deterrents, and Toxicologic Agents | 0 |
| Divarasib | 2417987-45-0 | | 0 |
| Dixanthogen | 502-55-6 | Antiparasitics | 0 |
| Dixyrazine | 2470-73-7 | Analgesics | 0 |
| Dmethylthiambuteen | | | 0 |
| Dobesilic acid | 88-46-0 | Cardiac stimulants | 0 |
| Docaravimab | 2247196-23-0 | Immunomodulators | 0 |
| Docarpamine | 74639-40-0 | | 0 |