Synonyms: (3as,5as,9as,9bs)-3-ethynyl-3-hydroxy-3a-methyl-7-methylidenedodecahydro-2'h-spiro[cyclopenta[a]naphthalene-6,1'-cyclopentan]-2'-one;AC1Q6EMK;KST-1A7341;61599-38-0;AR-1A4061;3,19-Cyclo-3,4-secopregn-4-en-20-yn-1-one, 17-hydroxy-, (17alpha)-;(10R)-17beta-Hydroxy-5-methylene-4,10-cyclo-19-nor-4,5-seco-17alpha-pregn-20-yn-1-one