| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-193511 | N/A | Impurity | |
| Vilanterol Impurity 11 | ||||
| C4X-193515 | 208925-08-0 | Impurity | |
| Vilanterol Impurity 15 | ||||
| C4X-193520 | N/A | Impurity | |
| Vilanterol Impurity 20 Triphenylacetate (S-Isomer) | ||||
| C4X-193525 | N/A | Impurity | |
| Vilanterol Impurity 25 L-Tartrate | ||||
| C4X-193526 | N/A | Impurity | |
| Vilanterol Impurity 26 | ||||
| C4X-193527 | 503068-65-3 (free base) | Impurity | |
| Vilanterol Impurity 27 | ||||
| C4X-193528 | 503069-68-9 (free base) | Impurity | |
| Vilanterol Impurity 28 | ||||
| C4X-193529 | N/A | Impurity | |
| Vilanterol Impurity 29 Triphenylacetate | ||||
| C4X-193531 | N/A | Impurity | |
| Vilanterol Impurity 31 | ||||
| C4X-193534 | 503070-64-2 | Impurity | |
| Vilanterol Impurity 34 | ||||
