| Timolol Process Impurity | 194861-99-9 | Ax-IMP1919 |
| Timolol Impurity B | 59697-06-2 | Ax-IMP1918 |
| Penciclovir Reference Standard | 39809-25-1 | Ax-IMP1913 |
| Penciclovir Impurity B | 97845-80-2 | Ax-IMP1914 |
| Penciclovir Impurity C | 97845-72-2 | Ax-IMP1915 |
| Penciclovir Impurity D | 172529-94-1 | Ax-IMP1916 |
| Penciclovir Impurity E | 97845-60-8 | Ax-IMP1917 |
| Deschloro Atovaquone | 92458-44-1 | Ax-IMP1911 |
| Ibuprofen ester impurity | 1161014-75-0 | Ax-IMP1912 |
| Acetone Difluoro Impurity | 431-05-0 | Ax-IMP1910 |