 | C4X-11547 | 2519848-42-9 | Impurity | |
| Methotrexate EP Impurity G |
 | C4X-11548 | 67022-39-3 | Impurity | |
| Methotrexate EP Impurity H |
 | C4X-11549 | 66147-29-3 | Impurity | |
| Methotrexate EP Impurity I |
 | C4X-11551 | N/A | Impurity | |
| Sitafloxacin Impurity 1 |
| C4X-115510 | 185225-84-7 | Impurity | |
| Sitafloxacin Impurity 10 |
| C4X-115511 | 1799439-05-6 | Impurity | |
| Sitafloxacin impurity 11 |
| C4X-115512 | 2008714-64-3 | Impurity | |
| Sitafloxacin Impurity 12 |
 | C4X-115513 | 127199-44-4 | Impurity | |
| (7R)-Sitafloxacin Impurity 13 |
| C4X-115515 | N/A | Impurity | |
| Sitafloxacin Impurity 15 |
| C4X-115516 | 98349-24-7 | Impurity | |
| Sitafloxacin Impurity 16 |
