| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-182914 | 2451658-74-3 | Impurity | |
| Letrozole Impurity 14 | ||||
| C4X-182915 | 74231-65-5 | Impurity | |
| Letrozole Impurity 15 | ||||
 | C4X-182917 | 112809-27-5 | Impurity | |
| Letrozole Impurity 17 | ||||
| C4X-182918 | N/A | Impurity | |
| Letrozole Impurity 18 | ||||
| C4X-182919 | N/A | Impurity | |
| Letrozole Impurity 19 | ||||
 | C4X-18292 | 113402-31-6 | Impurity | |
| Letrozole EP Impurity B | ||||
| C4X-182920 | N/A | Impurity | |
| Letrozole Impurity 20 | ||||
| C4X-182921 | N/A | Impurity | |
| Letrozole Impurity 21 | ||||
| C4X-182922 | 876728-37-9 | Impurity | |
| Letrozole Impurity 22 | ||||
| C4X-182923 | 876316-41-5 | Impurity | |
| Letrozole Impurity 23 | ||||
