| Simvastatin Process Impurity 1 | 145576-24-5 | Ax-IMP1253 |
| Pimavanserin Impurity 4 | NA | Ax-IMP2667 |
| Pimavanserin Impurity 5 | NA | Ax-IMP2668 |
| Pimavanserin Impurity 6 | NA | Ax-IMP2669 |
| Pimavanserin Impurity 7 | NA | Ax-IMP2670 |
| Simvastatin Process Impurity 2 | 132748-10-8 | Ax-IMP1254 |
| Pimavanserin Process Impurity 1 | NA | Ax-IMP2673 |
| Pimavanserin Process Impurity 2 | NA | Ax-IMP2674 |
| Simvastatin Impurity A | 101314-97-0 | Ax-IMP1238 |
| 3-Oxauracil | 34314-63-1 | Ax-773 |