 | C4X-123239 | N/A | Impurity | |
| Emtricitabine Impurity 39 |
| C4X-12324 | 145397-25-7 | Impurity | |
| Emtricitabine Impurity 4 |
| C4X-123240 | N/A | Impurity | |
| Emtricitabine Cyclic Impurity 40 |
 | C4X-12326 | 145986-26-1 | Impurity | |
| Emtricitabine 5-Epimer |
 | C4X-12327 | 137530-41-7 | Impurity | |
| Emtricitabine Enantiomer |
 | C4X-12329 | 145416-34-8 | Impurity | |
| 2-epi-Emtricitabine |
| C4X-12331 | 31750-48-8 | Impurity | |
| Tamoxifen EP Impurity F |
 | C4X-123310 | 15917-65-4 | Impurity | |
| Tamoxifen EP Impurity F HCl |
 | C4X-123311 | 5435-24-5 | Impurity | |
| Tamoxifen Impurity 11 |
 | C4X-123313 | 15917-51-8 | Impurity | |
| Tamoxifen EP Impurity D HCl (E-Isomer) |
