 | C4X-123826 | 7560-85-2 | Impurity | |
| Eszopiclone Impurity 26 |
 | C4X-123827 | 1216659-29-8 | Impurity | |
| Eszopiclone Impurity 27 |
| C4X-123828 | N/A | Impurity | |
| Eszopiclone impurity 28 Sodium salt |
 | C4X-12383 | 43200-96-0 | Impurity | |
| Zopiclone N-Oxide |
 | C4X-12384 | 43200-81-3 | Impurity | |
| Zopiclone EP Impurity B |
 | C4X-12385 | 138729-47-2 | Impurity | |
| Eszopiclone (S-Zopiclone) |
 | C4X-12386 | 1122549-43-2 | Impurity | |
| Eszopiclone Impurity 6 |
 | C4X-12387 | 43200-83-5 | Impurity | |
| Eszopiclone Impurity 7 |
| C4X-12388 | N/A | Impurity | |
| Zopiclone Impurity 8 (Mixture of Diastereomers) |
 | C4X-12391 | 120511-72-0 | Impurity | |
| Anastrozole EP Impurity H |
