 | C4X-185710 | 833-86-3 | Impurity | |
| Benzhexol Impurity 10 |
 | C4X-185711 | 161564-79-0 | Impurity | |
| Benzhexol Impurity 11 |
| C4X-185712 | 67562-42-9 (free base) | Impurity | |
| (E)-Benzhexol Impurity 12 HCl |
| C4X-185713 | 4352-39-0 | Impurity | |
| Trihexyphenidyl Impurity 13 |
| C4X-185714 | 344890-62-6 (free base) | Impurity | |
| Trihexyphenidyl Impurity 14 HCl |
| C4X-185715 | 952-51-2 | Impurity | |
| Trihexyphenidyl impurity 15 |
| C4X-18574 | N/A | Impurity | |
| Benzhexol Impurity 4 |
| C4X-18576 | N/A | Impurity | |
| Benzhexol Impurity 6 |
 | C4X-18579 | 1193-81-3 | Impurity | |
| Benzhexol Impurity 9 |
| C4X-18581 | 39068-94-5 | Impurity | |
| Trimebutine EP Impurity A |
