| Chemical Structure | CAT No. | CAS | Item Group | Purity |
|---|---|---|---|---|
 | C4X-152544 | 58993-79-6 | Impurity | |
| Formoterol Impurity 44 | ||||
| C4X-152546 | 22331-70-0 | Impurity | |
| Formoterol Impurity 46 | ||||
| C4X-152547 | 245759-66-4 | Impurity | |
| Formoterol Impurity 47 | ||||
| C4X-152548 | 87179-33-7 | Impurity | |
| Formoterol Impurity 48 | ||||
 | C4X-152549 | 14367-46-5 | Impurity | |
| Formoterol Impurity 49 | ||||
 | C4X-15255 | 1616967-26-0 | Impurity | |
| Formoterol EP Impurity E | ||||
 | C4X-152550 | 245759-62-0 | Impurity | |
| Formoterol Impurity 50 | ||||
| C4X-152551 | 2386293-34-9(Free Base) | Impurity | |
| Formoterol Impurity 51 HCl | ||||
| C4X-152552 | N/A | Impurity | |
| "(R,R)-Formoterol Impurity 97" | ||||
| C4X-152553 | 188690-83-7 | Impurity | |
| "(R,R)-Formoterol Impurity 53" | ||||
