 | C4X-18994 | 13093-87-3 | Impurity | |
| Benzylpenicillin EP Impurity D |
 | C4X-189940 | 76350-36-2 | Impurity | |
| Penicillin Impurity 40 |
| C4X-189941 | N/A | Impurity | |
| Penicillin Impurity 41 |
| C4X-189942 | N/A | Impurity | |
| Penicillin Impurity 42 |
| C4X-189943 | N/A | Impurity | |
| Penicillin Impurity 43 |
| C4X-189944 | N/A | Impurity | |
| Penicillin Impurity 44 |
| C4X-189945 | 525-91-7 (free base) | Impurity | |
| Benzylpenicillin EP Impurity C Potassium Salt |
| C4X-18995 | N/A | Impurity | |
| Benzylpenicillin EP Impurity E |
 | C4X-18996 | 501-34-8 | Impurity | |
| Benzylpenicillin EP Impurity F |
| C4X-18997 | N/A | Impurity | |
| Benzylpenicillin Impurity 7(Benzylpenicillin CP Impurity G) |
