 | 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 |
 | C4X-10019 | 527-75-3 | Impurity | |
| Erythromycin B |
 | C4X-10021 | 118058-74-5 | Impurity | |
| Clarithromycin EP Impurity I |
 | C4X-100210 | 81103-14-2 | Impurity | |
| Clarithromycin EP Impurity E |
