 | C4X-167714 | 4222-96-2 | Impurity | |
| Levonorgestrel EP Impurity N |
 | C4X-167715 | 155683-60-6 | Impurity | |
| Levonorgestrel EP Impurity O |
 | C4X-167716 | 100021-05-4 | Impurity | |
| Levonorgestrel EP Impurity P |
 | C4X-167718 | 2322-77-2 | Impurity | |
| Levonorgestrel EP Impurity R |
 | C4X-167719 | 176254-10-7 | Impurity | |
| Levonorgestrel EP Impurity S |
 | C4X-16772 | 19914-67-1 | Impurity | |
| Levonorgestrel EP Impurity B |
 | C4X-167720 | 14507-51-8 | Impurity | |
| Levonorgestrel EP Impurity T |
 | C4X-167721 | 14009-70-2 | Impurity | |
| Levonorgestrel EP Impurity V |
 | C4X-167723 | 797-64-8 | Impurity | |
| L-Norgestrel |
 | C4X-167726 | 14507-49-4 | Impurity | |
| Levonorgestrel EP Impurity Q |
