Synonyms: 17-Methoxy-19-nor-17-alpha-pregn-4-en-20-yn-3-one;AC1MHMP3;19-Nor-17-alpha-pregn-4-en-20-yn-3-one, 17-methoxy-;LS-97448;(8R,9S,10R,13S,14S)-17-ethynyl-17-methoxy-13-methyl-1,2,6,7,8,9,10,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one