 | C4X-100143 | 33442-56-7 | Impurity | |
| Erythromycin EP Impurity K |
 | C4X-100144 | 616234-56-1 | Impurity | |
| Erythromycin EP Impurity M |
 | C4X-100145 | 1094780-33-2 | Impurity | |
| Erythromycin Impurity 45 |
| C4X-100146 | N/A | Impurity | |
| Erythromycin Impurity 46 |
| C4X-100149 | 229318-98-3 | Impurity | |
| Erythromycin Impurity 49 |
 | C4X-10015 | 105882-69-7 | Impurity | |
| Erythromycin EP Impurity F |
| C4X-100150 | 37152-22-0 | Impurity | |
| Erythromycin Impurity 50 |
| C4X-100152 | N/A | Impurity | |
| Erythromycin ethylsuccinate Impurity 52 |
 | C4X-10016 | 41451-91-6 | Impurity | |
| Erythromycin EP Impurity C |
 | C4X-10017 | 82230-93-1 | Impurity | |
| Erythromycin EP Impurity A |
