 | C4X-14053 | 5006-69-9 | Impurity | |
| Metronidazole EP Impurity C |
 | C4X-140530 | 13182-90-6 | Impurity | |
| Metronidazole Impurity 30 |
| C4X-140531 | N/A | Impurity | |
| Metronidazole Impurity 31 |
| C4X-140535 | N/A | Impurity | |
| Metronidazole Impurity 35 |
 | C4X-14054 | 5006-68-8 | Impurity | |
| Metronidazole EP Impurity D |
 | C4X-14055 | 705-19-1 | Impurity | |
| Metronidazole EP Impurity E |
 | C4X-14056 | 16156-94-8 | Impurity | |
| Metronidazole EP Impurity F |
 | C4X-14057 | 1010-93-1 | Impurity | |
| Metronidazole EP Impurity G |
| C4X-14059 | 87009-72-1 | Impurity | |
| Metronidazole Impurity 9 |
 | C4X-14061 | 62-56-6 | Impurity | |
| Propylthiouracil EP Impurity A |
