左炔諾孕酮Levonorgestrel cas:797-63-7
左炔諾孕酮雜質(zhì)B Levonorgestrel Impurity B :
13-Ethyl-17-hydroxy-18,19-dinor-17α-pregn-5(10)-en-20-yn-3-one (Levo Norgestrel Impurity) 規(guī)格1mg
左炔諾孕酮雜質(zhì)C Levonorgestrel Impurity C :
13-Ethyl-3-ethynyl-18,19-dinor-17α-pregna-3,5-dien-20-yn-17-ol (Levo Norgestrel Impurity) 規(guī)格2.5mg
左炔諾孕酮雜質(zhì)D Levonorgestrel Impurity D:
13-Ethyl-18,19-dinor-17α-pregn-4-en-20-yn-17-ol (Levo Norgestrel Impurity) 規(guī)格2.5mg