 | C4X-100113 | 58781-38-7 | Impurity | |
| Erythromycin Impurity 13 |
| C4X-100114 | 40554-78-7 | Impurity | |
| 10,11-Anhydroerythromycin A |
 | C4X-100115 | 992-65-4 | Impurity | |
| Erythromycin EP Impurity H?Erythromycin A N-oxide? |
 | C4X-100116 | 546-57-6 | Impurity | |
| Erythromycin EP Impurity I?Erythralosamine? |
 | C4X-10012 | 33396-29-1 | Impurity | |
| Erythromycin EP Impurity E |
 | C4X-100121 | 105900-46-7 | Impurity | |
| Erythromycin EP Impurity J |
| C4X-100123 | 226086-79-9 | Impurity | |
| Erythromycin Impurity 23 |
 | C4X-100125 | 134931-01-4 | Impurity | |
| (9Z)-Erythromycin A Oxime |
 | C4X-100126 | 13483-18-6 | Impurity | |
| Erythromycin Impurity 26 |
 | C4X-10013 | 23893-13-2 | Impurity | |
| Erythromycin EP Impurity D |
