 | C4X-16218 | 571176-82-4 | Impurity | |
| Doripenem 4R Isomer Impurity |
 | C4X-16231 | 3663-80-7 | Impurity | |
| Doxazosin EP Impurity A |
 | C4X-162316 | 134749-43-2 | Impurity | |
| Doxazosin Impurity 16 |
 | C4X-16232 | 70918-74-0 | Impurity | |
| Doxazosin EP Impurity B |
 | C4X-16233 | 617677-53-9 | Impurity | |
| Doxazosin EP Impurity C |
 | C4X-16234 | 28888-44-0 | Impurity | |
| Doxazosin EP Impurity D |
 | C4X-16235 | 27631-29-4 | Impurity | |
| Doxazosin EP Impurity E |
 | C4X-16241 | 67372-68-3 | Impurity | |
| Drospirenone EP Impurity A |
| C4X-162413 | N/A | Impurity | |
| Drospirenone Impurity 13(Mixture of Diastereomers) |
 | C4X-16246 | 932388-90-4 | Impurity | |
| Drospirenone EP Impurity G |
