| Brexpiprazole Process Impurity 1 | NA | Ax-IMP1463 |
| Brexpiprazole Process Impurity 2 | NA | Ax-IMP1464 |
| Brexpiprazole Process Impurity 3 | NA | Ax-IMP1465 |
| Brexpiprazole Process Impurity 4 | 1359159-59-3 | Ax-IMP1467 |
| Clomiphene impurity A | 74056-26-1(HCl); 19957-52-9(Base); 97800-39-0 | Ax-IMP1456 |
| Clomiphene impurity B | 796-77-0 | Ax-IMP1457 |
| Clomiphene Impurity D | NA | Ax-IMP1458 |
| Clomiphene Impurity E | NA | Ax-IMP1459 |
| Clomiphene Impurity F | NA | Ax-IMP1460 |
| Doxepin N-oxide | 22684-91-9 | Ax-IMP1455 |