 | C4X-166627 | 1216883-23-6 | Stable isotopes | |
| Irbesartan-d4 |
 | C4X-166733 | NA | Stable isotopes | |
| 7-Ethyl-10-hydroxycamptothecin-D5 |
 | C4X-166739 | 718612-62-5 | Stable isotopes | |
| Irinotecan-d10 HCl |
 | C4X-166752 | 718612-51-2 | Stable isotopes | |
| Irinotecan Impurity 52-D5 |
| C4X-167212 | 1246815-13-3 | Stable isotopes | |
| "Lamotrigine-13C3,d3, Major" |
| C4X-16727 | NA | Stable isotopes | |
| Lamotrigine-13C-d3 |
 | C4X-167310 | 1189987-23-2 | Stable isotopes | |
| Leflunomide-d4 |
| C4X-167311 | 1185240-22-5 | Stable isotopes | |
| Leflunomide EP Impurity B-d4 (Teriflunomide-d4) |
 | C4X-167616 | 586954-09-8 | Stable isotopes | |
| Levodopa EP Impurity C-d3 (S-isomer) (L-3-O-Methyldopa-d3) |
| C4X-167724 | NA | Stable isotopes | |
| (-)-Norgestrel-d6 |
