 | 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 |
 | C4X-16247 | 932388-89-1 | Impurity | |
| Drospirenone EP Impurity H |
 | C4X-16271 | 353270-77-6 | Impurity | |
| Efavirenz Impurity 1 |
| C4X-162710 | 2125704-30-3 | Impurity | |
| Efavirenz Impurity 10 |
| C4X-162711 | N/A | Impurity | |
| Efavirenz Impurity 11 |
 | C4X-162714 | 209414-27-7 | Impurity | |
| Efavirenz USP Related Compound A |
 | C4X-162715 | 127641-25-2 | Impurity | |
| Efavirenz Impurity 15 |
