 | C4X-141843 | N/A | Impurity | |
| Promethazine Impurity 43 |
 | C4X-141844 | 132962-42-6 | Impurity | |
| Posaconazole Impurity 44 |
| C4X-141845 | N/A | Impurity | |
| Posaconazole Impurity 45 |
| C4X-14187 | 15375-48-1 | Impurity | |
| Promethazine Impurity 7 |
| C4X-14188 | N/A | Impurity | |
| Promethazine Impurity 8 |
| C4X-14189 | 81480-39-9?free base? | Impurity | |
| Promethazine Impurity 9 HCl |
 | C4X-14191 | 1391062-35-3 | Impurity | |
| Sulfasalazine Impurity 1 |
 | C4X-141910 | 1391062-49-9 | Impurity | |
| Sulfasalazine EP Impurity B |
| C4X-141911 | 1391062-34-2 (free acid) | Impurity | |
| Sulfasalazine EP Impurity E Trisodium Salt |
| C4X-141912 | 1391062-37-5 (free base) | Impurity | |
| Sulfasalazine EP Impurity G Disodium Salt |
