86679-33-6

Levonorgestrel butyrate 13-Ethyl-17α-(1-oxobutoxy)-18,19-dinorpregn-4-en-20-yn-3-one 13-ethyl-17alpha-hydroxy-18,19-dinorpregn-4-en-20-yn-3-one butyrate 18,19-Dinorpregn-4-en-20-yn-3-one,13-ethyl-17-(1-oxobutoxy)-, (17a)- 18,19-Dinorpregn-4-en-20-yn-3-one, 13-ethyl-17-(1-oxobutoxy)-, (17α)- (17alpha)-13-Ethyl-17-(1-oxobutoxy)-18,19-dinorpregn-4-en-20-yn-3-one