 | C4X-159119 | 37928-17-9 | Impurity | |
| Parecoxib sodium Impurity 19 |
 | C4X-15912 | 181695-72-7 | Impurity | |
| Parecoxib sodium Impurity 2 |
| C4X-159123 | 509074-26-4 | Impurity | |
| Parecoxib Sodium Impurity 23 |
| C4X-159124 | N/A | Impurity | |
| Parecoxib Sodium Impurity 24 |
 | C4X-159125 | 1884279-18-8 | Impurity | |
| Parecoxib Sodium Impurity 25 |
| C4X-159126 | N/A | Impurity | |
| Parecoxib Sodium Impurity 26 |
| C4X-159140 | 2235371-89-6 | Impurity | |
| Parecoxib sodium Impurity 40 |
| C4X-159144 | 2338845-31-9 | Impurity | |
| Parecoxib Impurity 44 |
| C4X-159145 | 75115-00-3 | Impurity | |
| Parecoxib sodium Impurity 45 |
 | C4X-159146 | 477594-28-8 | Impurity | |
| Parecoxib Sodium Impurity 46 |
