7-MNADD 7-Methyl-A-norandrostane-2,17-diethynyl-2,17-diol 73672-11-4 7alpha-Methyl-A-nor-5alpha-androstane-2alpha,17alpha-diethynyl-2beta,17beta-diol 7beta-Methyl-A-nor-5alpha-androstane-2alpha,17alpha-diethynyl-2beta,17beta-diol