| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-193530 | 503070-62-0 (free base) | Impurity | |
| Vilanterol Impurity 30 | ||||
| C4X-193531 | N/A | Impurity | |
| Vilanterol Impurity 31 | ||||
| C4X-193532 | N/A | Impurity | |
| Vilanterol Impurity 32 | ||||
| C4X-193533 | N/A | Impurity | |
| Vilanterol Impurity 33 | ||||
| C4X-193534 | 503070-64-2 | Impurity | |
| Vilanterol Impurity 34 | ||||
| C4X-193535 | 85309-91-7 | Impurity | |
| Vilanterol Impurity 35 | ||||
| C4X-193536 | 452339-72-9 | Impurity | |
| Vilanterol Impurity 36 | ||||
| C4X-193537 | 452339-70-7 | Impurity | |
| Vilanterol Impurity 37 | ||||
| C4X-193538 | N/A | Impurity | |
| Vilanterol Impurity 38 | ||||
| C4X-193539 | 452339-71-8 | Impurity | |
| Vilanterol Impurity 39 | ||||
