| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-1079198 | N/A | Impurity | |
| Tofacitinib Impurity 198 | ||||
 | C4X-10792 | 1092578-48-7 | Impurity | |
| Tofacitinib Impurity 2 | ||||
 | C4X-107920 | 1092578-43-2 | Impurity | |
| Tofacitinib Impurity 20 | ||||
| C4X-1079200 | 1821717-21-8 (free base) | Impurity | |
| Tofacitinib Impurity 200 HCl | ||||
| C4X-1079201 | N/A | Impurity | |
| Tofacitinib Impurity 201 | ||||
| C4X-1079202 | N/A | Impurity | |
| Tofacitinib Impurity 202 | ||||
| C4X-1079203 | N/A | Impurity | |
| Tofacitinib Impurity 203 | ||||
| C4X-1079204 | N/A | Impurity | |
| Tofacitinib Impurity 204 | ||||
| C4X-1079205 | 2459302-87-3 | Impurity | |
| Tofacitinib Impurity 205 | ||||
| C4X-1079206 | N/A | Impurity | |
| Tofacitinib Impurity 206 | ||||
