 | C4X-167720 | 14507-51-8 | Impurity | |
| Levonorgestrel EP Impurity T |
 | C4X-167721 | 14009-70-2 | Impurity | |
| Levonorgestrel EP Impurity V |
 | C4X-167722 | 155683-59-3 | Impurity | |
| Levonorgestrel EP Impurity W |
 | 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-167729 | N/A | Impurity | |
| Levonorgestrel Impurity 29 |
 | C4X-16773 | 1337972-89-0 | Impurity | |
| Levonorgestrel EP Impurity C |
| C4X-167730 | N/A | Impurity | |
| Levonorgestrel Impurity 30 |
 | C4X-16774 | 32419-58-2 | Impurity | |
| Levonorgestrel EP Impurity D |
