英文别名:
(17alpha)-13-Ethyl-17-hydroxy-18,19-dinorpregn-5-en-20-yn-3-one;(17α)-13-Ethyl-17-hydroxy-18,19-dinorpregn-5-en-20-yn-3-one;Levonorgestrel IMpurity P;5(6)-Dehydro-4(5)-dihydro D-(-)-Norgestrel;5(6)-Dehydro-4(5)-dihydro D-(-)-Norgestrel (~90%);Levonorgestrel EP impurity P;(17a)-13-Ethyl-17-hydroxy-18,19-dinorpregn-5-en-20-yn-3-one;Levonorgestrel Impurity 16(Levonorgestrel EP Impurity P)