19914-67-1

Levonorgestrel EP IMP B Levonorgestrel EP impurity B EP Levonorgestrel Impurity B 13-Ethyl-17a-ethynyl-17-hydroxygon-5(10)-en-3-one 13-Ethyl-17α-ethynyl-17-hydroxygon-5(10)-en-3-one 17-Ethinyl-17-hydroxy-18-methylestr-5(10)-en-3-one Levonorgestrel Impurity 2（Levonorgestrel EP Impurity B） 13-Ethyl-17-hydroxy-18,19-dinorpregn-5(10)-en-20-yn-3-one 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one 13-ethyl-17-hydroxy-18,19-dinor-17a-pregn-5(10)-en-20-yn-3-one 13-ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (17α)-13-Ethyl-17-hydroxy-18,19-dinorpregn-5(10)-en-20-yn-3-one 18,19-Dinorpregn-5(10)-en-20-yn-3-one, 13-ethyl-17-hydroxy-, (17α)- 13-Ethyl-17-hydroxy-18,19-dinor-17a-pregn-5(10)-en-20-yn-3-one - EP 13-Ethyl-17-hydroxy-18,19-dinor-17a-pregn-5(10)-en-20-yn-3-one (Levo Norgestrel IMpurity) 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (Levo Norgestrel Impurity) 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (Levo Norgestrel Impurity) 13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one(Levonorgestrel Impurity B) 13-Ethyl-17-hydroxy-18,19-dinor-17a-pregn-5(10)-en-20-yn-3-one(Levonorgestrel Impurity B)