| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-107939 | N/A | Impurity | |
| Tofacitinib Impurity 39 | ||||
 | C4X-10794 | 477600-73-0 | Impurity | |
| Tofacitinib Impurity 4 | ||||
| C4X-107941 | N/A | Impurity | |
| Tofacitinib Impurity 41 | ||||
| C4X-107942 | N/A | Impurity | |
| Tofacitinib Impurity 42 | ||||
| C4X-107944 | N/A | Impurity | |
| (See C4X-107915)Tofacitinib Impurity 44 | ||||
| C4X-107945 | N/A | Impurity | |
| Tofacitinib Impurity 45 | ||||
| C4X-107947 | N/A | Impurity | |
| Tofacitinib Impurity 47 | ||||
| C4X-107948 | N/A | Impurity | |
| Tofacitinib Impurity 48 | ||||
 | C4X-107949 | 2459302-78-2 | Impurity | |
| Tofacitinib Impurity 49 | ||||
 | C4X-10795 | 1616760-97-4 | Impurity | |
| Tofacitinib Impurity 5 | ||||
