 | C4X-18989 | N/A | Impurity | |
| Thymalfasin Impurity 9 |
| C4X-18991 | N/A | Impurity | |
| Benzylpenicillin Impurity 1 |
| C4X-189910 | N/A | Impurity | |
| Benzylpenicillin Impurity 10(Benzylpenicillin CP Impurity J) |
 | C4X-189911 | 118-53-6 | Impurity | |
| Benzylpenicillin Impurity 11 |
 | C4X-189913 | 31447-86-6 | Impurity | |
| Benzylpenicillin Potassium EP Impurity I potassium salt |
| C4X-189915 | N/A | Impurity | |
| Penicillin F Potassium Salt(Benzylpenicillin Impurity G Potassium Salt) |
 | C4X-189918 | 525-91-7 | Impurity | |
| Benzylpenicillin Potassium EP impurity C |
 | C4X-189919 | 4152-09-4 | Impurity | |
| Benzylpenicillin Impurity 19 |
 | C4X-189921 | 13057-98-2 | Impurity | |
| Benzylpenicillin Impurity 21(Mixture of Diastereomers) |
| C4X-189925 | N/A | Impurity | |
| Benzylpenicillin Impurity 25 |
