| Pyridostigmine Impurity A | 51581-32-9 | Ax-IMP334 |
| Metformin HCl | 1115-70-4 | Ax-IMP333 |
| Metformin EP Impurity D | 108-78-1 | Ax-IMP331 |
| Metformin EP Impurity C | 1985-46-2 | Ax-IMP330 |
| Metformin EP Impurity E | 36801-25-9 | Ax-IMP332 |
| Metformin EP Impurity B | 2959-04-8 | Ax-IMP329 |
| Metformin EP Impurity A | 461-58-5 | Ax-IMP328 |
| Tacrolimus 8-Propyl Analog | 104987-30-6 | Ax-IMP327 |
| Tacrolimus 8-Epimer | 129212-35-7 | Ax-IMP326 |
| Tacrolimus 19-epimer | NA | Ax-IMP325 |