19-Nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-2,17-diol, 3-methoxy- 19-Norpregna-1,3,5(10)-trien-20-yne-2,17-diol, 3-methoxy-, (17-alpha)- (9CI) 2-Hydroxymestranol 26011-40-5 3-Methoxy-19-nor-17-alpha-pregna-1,3,5(10)-trien-20-yne-2,17-diol 3-Methoxy-19-norpregna-1,3,5(10)-trien-20-yne-2,17alpha-diol