Synonyms: 17-Hydroxy-5-alpha,17-alpha-pregn-20-yn-3-one;5-alpha,17-alpha-Pregn-20-yn-3-one, 17-hydroxy-;5-alpha-Androstan-17-alpha-ethynyl-17-beta-ol-3-one;Pregn-20-yn-3-one, 17-hydroxy-, (5-alpha,17-alpha)-;AC1L52YK;LS-118777;(5S,8R,9S,10S,13S,14S)-17-ethynyl-17-hydroxy-10,13-dimethyl-2,4,5,6,7,8,9,11,12,14,15,16-dodecahydro-1H-cyclopenta[a]phenanthren-3-one;13611-97-7