(7R,8R,9S,13S,14S,17R)-17-ethynyl-3,3-dimethoxy-7,13-dimethyl-2,3,4,6,7,8,9,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-ol;(7?,17?)-3,3-Dimethoxy-7-methyl-19-norpregn-5(10)-en-20-yn-17-ol;Tibolone 3-Dimethyl Ketal
(7R,8R,9S,13S,14S,17R)-17-ethynyl-3,3-dimethoxy-7,13-dimethyl-2,3,4,6,7,8,9,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-ol;(7?,17?)-3,3-Dimethoxy-7-methyl-19-norpregn-5(10)-en-20-yn-17-ol;Tibolone 3-Dimethyl Ketal