| Lenalidomide Process Impurity 2 | 295357-72-1 | Ax-IMP755 |
| Japonilure Process Impurity 2 | NA | Ax-IMP2373 |
| Lenalidomide Process Impurity 3 | 1198787-39-1 | Ax-IMP756 |
| Japonilure Process Impurity 3 | NA | Ax-IMP2374 |
| Lenalidomide Process Impurity 4 | 295357-73-2 | Ax-IMP757 |
| (S)-2-chlorobutanoic acid | 32653-32-0 | Ax-540 |
| Lenalidomide Impurity 3 | 19171-19-8 | Ax-IMP753 |
| Levocetirizine Impurity G | 109806-71-5; 164726-80-1 (2HCl) | Ax-IMP2384 |
| Lenalidomide Impurity 2 | NA | Ax-IMP752 |
| Lenalidomide Impurity III | 295357-66-3 | Ax-IMP751 |