 | C4X-138325 | N/A | Impurity | |
| Pioglitazone impurity 25 |
| C4X-138326 | 446052-43-3 | Impurity | |
| Pioglitazone impurity 26 |
| C4X-138327 | N/A | Impurity | |
| Pioglitazone impurity 27 |
 | C4X-13833 | 868754-42-1 | Impurity | |
| Pioglitazone EP Impurity E |
 | C4X-13834 | 952188-00-0 | Impurity | |
| Pioglitazone EP Impurity C |
 | C4X-13835 | 868754-41-0 | Impurity | |
| Pioglitazone EP Impurity D |
 | C4X-13836 | 144809-28-9 | Impurity | |
| Pioglitazone Impurity 6 |
 | C4X-13837 | 146062-44-4 | Impurity | |
| Hydroxy Pioglitazone M-IV |
 | C4X-13838 | 74772-78-4 | Impurity | |
| Pioglitazone Impurity 8 |
 | C4X-13839 | 145350-09-0 | Impurity | |
| Pioglitazone N-Oxide |
