 | C4X-193115 | 3219-99-6 | Impurity | |
| 6-Epi Doxycycline(Doxycycline EP Impurity A) |
 | C4X-193119 | N/A | Impurity | |
| Doxycycline Impurity 19 |
| C4X-19312 | N/A | Impurity | |
| Doxycycline EP Impurity B |
| C4X-193120 | 2000233-92-9 | Impurity | |
| Doxycycline Impurity 20 |
 | C4X-19313 | 6543-77-7 | Impurity | |
| Doxycycline EP Impurity C |
 | C4X-19314 | 97583-08-9 | Impurity | |
| Doxycycline EP Impurity D |
 | C4X-19315 | 79-57-2 | Impurity | |
| Doxycycline EP Impurity E |
 | C4X-19316 | 122861-53-4 | Impurity | |
| Doxycycline EP Impurity F |
| C4X-19318 | N/A | Impurity | |
| Doxycycline Impurity 8 |
| C4X-19319 | N/A | Impurity | |
| Doxycycline Impurity 9 |
