 | C4X-115714 | 29144-31-8 | Impurity | |
| Dextromethorphan Impurity 14 (Mixture of Rotamers) |
 | C4X-115715 | 51072-34-5 | Impurity | |
| Dextromethorphan Impurity 15 |
 | C4X-115716 | 30356-07-1 | Impurity | |
| Dextromethorphan Impurity 16 |
| C4X-115717 | 30356-08-2 | Impurity | |
| Dextromethorphan Impurity 17 |
| C4X-115718 | N/A | Impurity | |
| Dextromethorphan Impurity 18 HCl |
 | C4X-115719 | 3399-73-3 | Impurity | |
| Dextromethorphan Impurity 19 |
| C4X-11572 | 1531-23-3(Free Base) | Impurity | |
| Dextromethorphan EP Impurity A HBr |
| C4X-115720 | 18584-20-8 | Impurity | |
| Dextromethorphan Impurity 20 |
 | C4X-115721 | 51773-23-0 | Impurity | |
| Dextromethorphan Impurity 21 |
| C4X-115724 | 1453167-99-1(Free Base) | Impurity | |
| Dextromethorphan EP Impurity D HBr |
