Synonyms: 3-(cyclopentyloxy)-17-(hexa-1,3-diyn-1-yl)estra-1,3,5(10)-trien-17-ol;Bdh 10131;AC1L4RUQ;AC1Q57CW;Bdh 10,131;AR-1E7478;17alpha-Hexa-1',3'-diynylestra-1,3,5(10)-trien-17beta-ol 3-cyclopentyl ether;(8R,9S,13S,14S)-3-cyclopentyloxy-17-hexa-1,3-diynyl-13-methyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-ol;19,21,27-Trinorcholesta-1,3,5(10)-triene-20(22),23-diyn-17-ol, 3-(cyclopentyloxy)-, (17alpha)-