 | C4X-167723 | 797-64-8 | Impurity | |
| L-Norgestrel |
 | C4X-167726 | 14507-49-4 | Impurity | |
| Levonorgestrel EP Impurity Q |
 | C4X-167728 | 793-55-5 | Impurity | |
| Levonorgestrel EP Impurity K |
 | C4X-16773 | 1337972-89-0 | Impurity | |
| Levonorgestrel EP Impurity C |
 | C4X-16774 | 32419-58-2 | Impurity | |
| Levonorgestrel EP Impurity D |
 | C4X-16778 | 55555-97-0 | Impurity | |
| Levonorgestrel EP Impurity H |
 | C4X-16779 | 21508-50-9 | Impurity | |
| Levonorgestrel EP Impurity I |
 | C4X-16781 | 6893-02-3 | Impurity | |
| Levothyroxine EP Impurity A |
 | C4X-167810 | 26041-51-0 | Impurity | |
| Levothyroxine N-Acetyl Impurity |
 | C4X-167812 | 5817-39-0 | Impurity | |
| Levothyroxine EP Impurity K |
