 | C4X-159057 | N/A | Impurity | |
| Safinamide Impurity 57 |
 | C4X-15906 | 174756-44-6 | Impurity | |
| Safinamide impurity 6 |
| C4X-15907 | 133865-32-4?free base? | Impurity | |
| Safinamide impurity 6 |
| C4X-15908 | 202825-45-4 | Impurity | |
| Safinamide Impurity 8 |
| C4X-15909 | N/A | Impurity | |
| Safinamide Impurity 9 |
| C4X-15911 | 198470-91-6 | Impurity | |
| Parecoxib Sodium Impurity 1 |
| C4X-159110 | 2229657-81-0 | Impurity | |
| Parecoxib sodium Impurity 10 |
 | C4X-159111 | 1708094-99-8 | Impurity | |
| Parecoxib sodium Impurity 11 |
 | C4X-159112 | 1373038-59-5 | Impurity | |
| Parecoxib sodium Impurity 12 |
| C4X-159113 | 1373038-60-8 (free acid) | Impurity | |
| Parecoxib Sodium Impurity 13 Sodium Salt |
