 | C4X-173266 | N/A | Impurity | |
| Piperacillin Impurity 66 |
| C4X-173268 | N/A | Impurity | |
| Piperacillin Dimer Impurity 68 |
 | C4X-17327 | 63422-71-9 | Impurity | |
| Piperacillin Sodium EP Impurity G |
| C4X-173270 | N/A | Impurity | |
| Piperacillin Impurity 70 (Mixture of Diastereomers) |
| C4X-173273 | N/A | Impurity | |
| S-Piperacillin Impurity J |
| C4X-17328 | N/A | Impurity | |
| Piperacillin Impurity 8 |
 | C4X-17331 | 504-29-0 | Impurity | |
| Piroxicam EP Impurity A |
 | C4X-173310 | 35511-15-0 | Impurity | |
| Piroxicam EP Impurity J |
 | C4X-173311 | 24683-26-9 | Impurity | |
| Piroxicam EP Impurity K(Meloxicam EP Impurity A) |
 | C4X-173312 | 118854-48-1 | Impurity | |
| Piroxicam EP Impurity L(Meloxicam EP Impurity F) |
