 | C4X-115736 | N/A | Impurity | |
| Dextromethorphan Impurity 36 |
| C4X-115737 | 2382909-24-0 | Impurity | |
| Dextromethorphan Impurity 37 |
 | C4X-115738 | 1087-69-0 | Impurity | |
| Dextromethorphan EP Impurity A Hydrochloride |
 | C4X-11574 | 1453167-99-1 | Impurity | |
| Dextromethorphan EP Impurity D |
| C4X-115740 | 30356-07-1(free base) | Impurity | |
| Dextromethorphan Impurity 16 HCl |
| C4X-11575 | 1177494-18-6 | Impurity | |
| Dextromethorphan N-Oxide |
 | C4X-11576 | 125-73-5 | Impurity | |
| Dextromethorphan EP Impurity B |
| C4X-11577 | N/A | Impurity | |
| Dextromethorphan Impurity 7 |
 | C4X-11578 | 1177419-85-0 | Impurity | |
| Dextromethorphan N-Oxide?HCl? |
| C4X-11579 | N/A | Impurity | |
| (6aS)-Dextromethorphan Impurity 9 |
