 | C4X-173258 | NA | Stable isotopes | |
| Piperacillin-d5 (N-ethyl-d5) |
| C4X-173725 | NA | Stable isotopes | |
| 6?-Methyl Prednisolone-d3 |
| C4X-17463 | 392711-19-2 | Stable isotopes | |
| Rapamycin-d3 (Sirolimus-d3) |
| C4X-175128 | 155213-67-5(unlabelled) | Stable isotopes | |
| Ritonavir-d6 |
| C4X-17538 | 1217667-10-1 | Stable isotopes | |
| Ropivacaine-d7 Hydrochloride |
 | C4X-17542 | 1426173-86-5 | Stable isotopes | |
| Silodosin-d4 |
| C4X-17544 | NA | Stable isotopes | |
| Silodosin glucuronide D4 |
| C4X-175614 | NA | Stable isotopes | |
| Sulbactam-d3 |
| C4X-175621 | 1322625-44-4 | Stable isotopes | |
| Sulbactam-d5 Sodium Salt (Major) |
| C4X-176435 | NA | Stable isotopes | |
| Tiotropium Bromide EP Impurity G-d3 |
