| Record No. | Name | No. of Entries |
| 476 | Morphine | 10 |
| 477 | Morphine 3-nicotinate | 1 |
| 478 | Morphine 6-nicotinate | 1 |
| 479 | MORPHINE ACETATE | 1 |
| 480 | Morphine di-pfp | 1 |
| 481 | Morphine methiodide | 1 |
| 482 | Morphine methochloride | 1 |
| 483 | Morphine monohemisuccinate | 1 |
| 484 | Morphine monohydrate | 1 |
| 485 | MORPHINE OLEATE | 1 |
| 486 | MORPHINE TARTRATE | 1 |
| 487 | Morphine,bis(trimethylsilyl)- | 1 |
| 488 | Morphine,deoxy-,hydrochloride | 1 |
| 489 | Morphine,deoxy-,salicylate salt | 1 |
| 490 | MORPHINE,DEOXY-HYDROCHLORIDE | 1 |
| 491 | Morphine,diacetyl-,hydrochloride | 1 |
| 492 | Morphine,sulfate (pentahydrate) | 1 |
| 493 | Morphine-3-glucuronide | 1 |
| 494 | Morphine-6-glucuronide | 1 |
| 495 | Morphine-7,8-oxide | 1 |
| 496 | Morphosan | 1 |
| 497 | MORPHOTHEBAINE,HYDROCHLORIDE | 1 |
| 498 | Moxaverine | 2 |
| 499 | Myrocodin | 1 |
| 500 | N-(2)-nor-d-tetrandrine | 1 |