| Nortriptyline EP Impurity B | 303-53-7 | Ax-IMP071 |
| Nortriptyline EP Impurity C | 894-71-3 | Ax-IMP072 |
| Amitriptyline Related Compound B | 1159-03-1 | Ax-IMP073 |
| Amitriptyline EP Impurity G | 1210-34-0 | Ax-IMP074 |
| Terbinafine N-oxide | NA | Ax-IMP075 |
| Nortriptyline Impurity E | 6202-23-9 | Ax-IMP045 |
| Nortriptyline Impurity F | 549-18-8 | Ax-IMP046 |
| Nortriptyline Impurity G | 16234-88-1 | Ax-IMP047 |
| Nortriptyline Impurity H | 24755-73-5 | Ax-IMP048 |
| Nortriptyline Impurity I | 1210-35-1 | Ax-IMP049 |