 | C4X-13454 | N/A | Impurity | |
| Spironolactone EP Impurity D |
 | C4X-13455 | 33784-05-3 | Impurity | |
| Spironolactone EP Impurity E |
 | C4X-13456 | 976-71-6 | Impurity | |
| Spironolactone EP Impurity F |
 | C4X-13457 | 880106-10-5 | Impurity | |
| Spironolactone EP Impurity G |
 | C4X-13458 | 53866-24-3 | Impurity | |
| Spironolactone EP Impurity H |
| C4X-13459 | N/A | Impurity | |
| Spironolactone EP Impurity I |
| C4X-134613 | N/A | Impurity | |
| Fentanyl EP Impurity H |
 | C4X-13466 | 62-53-3 | Impurity | |
| Aniline (Mesalazine EP Impurity K) |
| C4X-13471 | N/A | Impurity | |
| Tebipenem pivoxil Impurity 1 |
 | C4X-134710 | 96-53-7 | Impurity | |
| Tebipenem Impurity 10 |
