 | C4X-159050 | N/A | Impurity | |
| Safinamide impurity 50 |
| C4X-159052 | 100370-27-3 | Impurity | |
| Safinamide impurity 52 |
 | C4X-15906 | 174756-44-6 | Impurity | |
| Safinamide impurity 6 |
| C4X-15908 | 202825-45-4 | Impurity | |
| Safinamide Impurity 8 |
| C4X-15911 | 198470-91-6 | Impurity | |
| Parecoxib Sodium Impurity 1 |
| C4X-159110 | 2229657-81-0 | Impurity | |
| Parecoxib sodium Impurity 10 |
 | C4X-159112 | 1373038-59-5 | Impurity | |
| Parecoxib sodium Impurity 12 |
 | C4X-159114 | 1709956-89-7 | Impurity | |
| Parecoxib Sodium Impurity 14 |
 | C4X-159116 | 198471-06-6 | Impurity | |
| Parecoxib sodium Impurity 16 |
 | C4X-159117 | 451-40-1 | Impurity | |
| Parecoxib sodium Impurity 17 |
