| Lanicemine | 153322-05-5 | Central Nervous System Agents | 0 |
| Lanifibranor | 927961-18-0 | | 0 |
| Lanimostim | 117276-75-2 | Antifungals | 0 |
| Laninamivir | 203120-17-6 | Anti-infective Agents | 0 |
| Laninamivir octanoate | 203120-46-1 | | 0 |
| Laniquidar | 197509-46-9 | Other substances | 0 |
| Lanopepden | 1152107-25-9 | Enzyme Replacements/modifiers | 0 |
| Lanosterol | 79-63-0 | | 0 |
| Lanoteplase | 171870-23-8 | Other substances | 0 |
| Lanraplenib | 1800046-95-0 | | 0 |
| Lansoprazole sulfone | 131926-99-3 | | 0 |
| Lapachone | 4707-32-8 | Anti-infective Agents | 0 |
| Lapaquistat | 189059-71-0 | | 0 |
| Lapyrium | 109260-82-4 | | 0 |
| Laquinimod | 248281-84-7 | | 0 |
| Larazotide | 258818-34-7 | Other substances | 0 |
| Larcaviximab | 1792982-56-9 | Immunomodulators | 0 |
| Laromustine | 173424-77-6 | Anticancer drugs | 0 |
| Laronidase | 210589-09-6 | | 0 |
| Laropiprant | 571170-77-9 | | 0 |
| Larotaxel | 156294-36-9 | Anticancer drugs | 0 |
| Larsucosterol | 884905-07-1 | | 0 |
| Laruparetigene zovaparvovec | 2425817-08-7 | | 0 |
| Lasalocid | 25999-31-9 | Anti-infective Agents | 0 |
| Lasofoxifene | 180916-16-9 | Genitourinary Agents | 0 |
| Latiglutenase | 1360452-96-5 | Other substances | 0 |
| Latrepirdine | 3613-73-8 | | 0 |
| Latrunculin A | 76343-93-6 | Anticancer drugs | 0 |
| Latrunculin B | 76343-94-7 | | 0 |
| Lauric acid | 143-07-7 | Antidepressants | 0 |
| Laurocapram | 59227-89-3 | | 0 |
| Lauroyl chloride | 112-16-3 | | 0 |
| Lauryl alcohol diphosphonic acid | 16610-63-2 | | 0 |
| Lauryl glucoside | 27836-64-2 | | 0 |
| Lauryldimethylbetaine | 683-10-3 | Other substances | 0 |
| Lavendustin A | 125697-92-9 | Enzyme Replacements/modifiers | 0 |
| Lavendustin b | 125697-91-8 | | 0 |
| Lavoltidine | 76956-02-0 | Diagnostic agents | 0 |
| Lawsone | 83-72-7 | Anti-infective Agents | 0 |
| Lazertinib | 1903008-80-9 | Enzyme Replacements/modifiers | 0 |