 | C4X-132453 | N/A | Impurity | |
| Mesalazine Impurity 53 |
 | C4X-13246 | 570-23-0 | Impurity | |
| Mesalazine EP Impurity F |
 | C4X-13247 | 490-79-9 | Impurity | |
| Mesalazine EP Impurity G |
 | C4X-13249 | 112725-89-0 | Impurity | |
| Mesalazine EP Impurity J |
| C4X-13251 | 26878-13-7 | Impurity | |
| Aclidinium bromide Impurity 1 |
| C4X-132510 | 1708930-15-7 | Impurity | |
| Aclidinium bromide Impurity 10 |
| C4X-132511 | N/A | Impurity | |
| Aclidinium bromide Impurity 11 |
| C4X-132512 | 320347-97-5 | Impurity | |
| Aclidinium bromide Impurity 12 |
| C4X-13252 | 7333-07-5 | Impurity | |
| Aclidinium bromide Impurity 2 |
 | C4X-13253 | 4746-63-8 | Impurity | |
| Tiotropium EP Impurity A |
