 | C4X-21045 | 5428-61-5 (free base) | Impurity | |
| Chloroquine USP Related Compound E |
| C4X-21047 | N/A | Impurity | |
| Chloroquine USP Related Compound G |
 | C4X-21051 | 438-67-5 | Impurity | |
| Estrone 3-Sulfate Sodium Salt |
 | C4X-21056 | 1089-80-1 | Impurity | |
| Estrone impurity 6 |
 | C4X-21057 | 2479-90-5 | Impurity | |
| Estrone Impurity 7 |
| C4X-21058 | N/A | Impurity | |
| Estrone Impurity 8 |
| C4X-21061 | N/A | Impurity | |
| Cys1-Linaclotide Imidazolidione Impurity XTFA Salt |
| C4X-210612 | N/A | Impurity | |
| Disulfide Bonded Polymers A-Linaclotide |
| C4X-210613 | N/A | Impurity | |
| Intermolecular Dehydration (Tyr-Cys) -Linaclotide |
| C4X-210614 | N/A | Impurity | |
| Sulfate Group-Cys1-Linaclotide XTFA Salt |
