| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-107921 | N/A | Impurity | |
| Tofacitinib Impurity 21 | ||||
| C4X-107922 | 2227199-28-0 | Impurity | |
| Tofacitinib Impurity 22 | ||||
| C4X-107923 | N/A | Impurity | |
| Tofacitinib Impurity 23 DiHCl | ||||
| C4X-107925 | N/A | Impurity | |
| Tofacitinib Impurity 25 | ||||
| C4X-107926 | N/A | Impurity | |
| Tofacitinib Impurity 26 | ||||
 | C4X-107927 | 2028267-73-2 | Impurity | |
| Tofacitinib Impurity 27 | ||||
| C4X-107929 | N/A | Impurity | |
| Tofacitinib RS/SR mixture Citrate | ||||
 | C4X-10793 | 1092578-47-6 | Impurity | |
| Tofacitinib Impurity 3 | ||||
| C4X-107930 | N/A | Impurity | |
| Tofacitinib Impurity 30 | ||||
| C4X-107931 | 923036-25-3 | Impurity | |
| Tofacitinib Impurity 31 | ||||
