| Methyl oxindole-5-carboxylate | 199328-10-4 | Ax-523 |
| Clavulanate Impurity A | 4744-51-8 | Ax-IMP701 |
| 1-(4-methylphenyl)-2-phenylethanone | 2001-28-7 | Ax-521 |
| Clavulanate Impurity B | 96681-85-5 | Ax-IMP702 |
| 2-chloro-1-(4-fluorophenyl)-2-phenylethanone | 62148-67-8 | Ax-522 |
| Clavulanate Impurity C | 86917-74-0 | Ax-IMP703 |
| Droperidol Process Impurity 1 | 56660-98-1 | Ax-IMP2503 |
| Clavulanate Impurity D | 404839-11-8 | Ax-IMP704 |
| Droperidol Process Impurity 2 | NA | Ax-IMP2504 |
| Clavulanate Impurity E | NA | Ax-IMP705 |