Synonyms: 17-alpha-Butadiynyl-17-beta-hydroxyestr-5(10)-en-3-one;ESTR-5(10)-EN-3-ONE, 17-alpha-BUTADIYNYL-17-beta-HYDROXY-;AC1L27FN;2010-50-6;LS-64840;(17S)-17-buta-1,3-diynyl-17-hydroxy-13-methyl-1,2,4,6,7,8,9,11,12,14,15,16-dodecahydrocyclopenta[a]phenanthren-3-one