 | C4X-1079163 | N/A | Impurity | |
| Tofacitinib Impurity 163 |
 | C4X-1079164 | 71607-31-3 | Impurity | |
| Tofacitinib Impurity 164 |
| C4X-1079165 | N/A | Impurity | |
| Tofacitinib Impurity 165 |
| C4X-1079166 | N/A | Impurity | |
| Tofacitinib Impurity 166 DiHCl |
| C4X-1079167 | N/A | Impurity | |
| Tofacitinib Impurity 167 |
| C4X-1079168 | N/A | Impurity | |
| Tofacitinib Impurity 168 |
| C4X-1079169 | N/A | Impurity | |
| Tofacitinib Impurity 169 DiHCl |
 | C4X-107917 | 1675248-19-7 | Impurity | |
| Tofacitinib Impurity 17 |
| C4X-1079170 | N/A | Impurity | |
| Tofacitinib Impurity 170 Trifluoroacetate |
| C4X-1079171 | N/A | Impurity | |
| Tofacitinib Impurity 171 |
