(5R,11R,13S,14S,17S)-11-[4-(Dimethylamino)phenyl]-13-methyl-17-(1 -propyn-1-yl)-1,2,6,7,8,11,12,13,14,15,16,17-dodecahydrospiro[cyc lopenta[a]phenanthrene-3,2'-[1,3]dioxolane]-5,17(4H)-diol