| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-1069139 | 2218487-28-4 | Impurity | |
| Erlotinib impurity 139 | ||||
| C4X-106914 | N/A | Impurity | |
| Erlotinib Impurity 14 | ||||
| C4X-1069140 | 2055840-41-8 | Impurity | |
| Erlotinib impurity 140 | ||||
| C4X-1069141 | N/A | Impurity | |
| Erlotinib impurity 141 | ||||
| C4X-1069142 | N/A | Impurity | |
| Erlotinib impurity 142 | ||||
| C4X-1069143 | N/A | Impurity | |
| Erlotinib impurity 143 | ||||
| C4X-106915 | N/A | Impurity | |
| Erlotinib Impurity 15 | ||||
 | C4X-106916 | 183322-21-6 | Impurity | |
| Erlotinib Impurity 16 | ||||
 | C4X-106917 | 1417161-98-8 | Impurity | |
| Erlotinib Impurity 17 | ||||
| C4X-106918 | 1683583-37-0 | Impurity | |
| Erlotinib Impurity 18 | ||||
