| Parent Drug Name | Name of Impurity | Catalogue No. | |
|---|---|---|---|
| Estriol | Estetrol (Free Base) | VE0011412 | View CAS 15183-37-6 |
| Estriol | Estetrol Monohydrate | VE0011410 | View CAS 2055649-81-3 |
| Estriol | Estriol EP Impurity A | VE0015364 | View CAS 246021-20-5 |
| Estriol | Estriol EP Impurity C | VE0015359 | View CAS 1474-53-9 |
| Estriol | Estriol EP Impurity E | VE0015360 | View CAS 1228-72-4 |
| Estriol | Estriol EP Impurity F | VE0015361 | View CAS 547-81-9 |
| Estriol | Estriol EP Impurity G | VE0015362 | View CAS 793-89-5 |
| Estriol | Estriol EP Impurity H | VE0015351 | View CAS 566-76-7 |
| Estriol | Estriol EP Impurity I | VE0015358 | View CAS 15370-49-7 |
| Estriol | Estriol Impurity 3 | VE0015366 | View CAS 62013-81-4 |
| Estriol | Estriol Impurity 4 | VE0015367 | View |
| Estriol | 6-Oxo Estriol | VE0015363 | View CAS 7323-86-6 |
