| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-1079136 | 2803420-43-9 | Impurity | |
| Tofacitinib Impurity 136 | ||||
| C4X-1079137 | 7400-06-8 | Impurity | |
| Tofacitinib Impurity 137 | ||||
| C4X-1079138 | N/A | Impurity | |
| Tofacitinib Impurity 138 | ||||
| C4X-1079139 | N/A | Impurity | |
| Tofacitinib Impurity 139 | ||||
| C4X-107914 | 1809002-40-1 | Impurity | |
| Tofacitinib Impurity 14 | ||||
| C4X-1079140 | N/A | Impurity | |
| Tofacitinib Impurity 140 | ||||
 | C4X-1079141 | 1245811-22-6 | Impurity | |
| Tofacitinib Impurity 141 (Mixture of Tautomeric Isomers) | ||||
 | C4X-1079142 | 1431697-80-1 | Impurity | |
| Tofacitinib Impurity 142 | ||||
| C4X-1079143 | 1206875-41-3 | Impurity | |
| Tofacitinib Impurity 143 | ||||
| C4X-1079144 | 2091669-67-7 | Impurity | |
| Tofacitinib Impurity 144 | ||||
