 | C4X-149218 | N/A | Impurity | |
| Cefprozil EP Impurity E |
| C4X-149219 | 92676-86-3 | Impurity | |
| Cefprozil (E)-Isomer |
| C4X-149220 | N/A | Impurity | |
| Cefprozil Impurity 20 |
| C4X-149222 | N/A | Impurity | |
| Cefprozil EP Impurity K-Isomer 2 |
 | C4X-149227 | 114876-72-1 | Impurity | |
| Cefprozil (Z)-Isomer monohydrate |
 | C4X-149228 | 111900-24-4 | Impurity | |
| Cefprozil (E)-Isomer monohydrate |
 | C4X-14923 | 147103-93-3 | Impurity | |
| Cefprozil EP Impurity C(Cefadroxil EP Impurity E) |
| C4X-149235 | N/A | Impurity | |
| Cefprozil Impurity 35 |
 | C4X-14924 | 106447-44-3 | Impurity | |
| Cefprozil EP Impurity D |
| C4X-149244 | N/A | Impurity | |
| Cefprozil (Z)-Isomer Impurity 44 |
