| Record No. | Name | No. of Entries |
| 726 | Thalictrimine hydrochloride | 1 |
| 727 | Thalictrucarpine | 1 |
| 728 | Thalidasine | 12 |
| 729 | Thalifaberidine | 2 |
| 730 | Thaliporphine | 1 |
| 731 | Thalmidine | 4 |
| 732 | Thalmine | 1 |
| 733 | Thebacon | 1 |
| 734 | Thebaine | 9 |
| 735 | Thebaine hydrochloride | 1 |
| 736 | Thebaine hydrochloride monohydrate | 1 |
| 737 | THEBAINE PICRATE | 1 |
| 738 | Thio-colciran | 1 |
| 739 | Thiocholchicine | 1 |
| 740 | Thiodemecolcine | 1 |
| 741 | THP hydrochloride | 1 |
| 742 | THPV HBr | 2 |
| 743 | Tiliacorine | 3 |
| 744 | Toxiferine | 2 |
| 745 | Toxiferine I | 1 |
| 746 | Toxiferine IV | 1 |
| 747 | Tretoquinol | 2 |
| 748 | Triacetoneamine-N-Oxyl | 1 |
| 749 | Trihydroxy propyl noraporphine | 1 |
| 750 | Trilobine | 6 |