(Z)-(3S,8R,9S,10R,13S,14S,17R)-3-acetoxy-17-ethynyl-13-methyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl 3-acetoxybut-2-enoate
(Z)-(3S,8R,9S,10R,13S,14S,17R)-3-acetoxy-17-ethynyl-13-methyl-2,3,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl 3-acetoxybut-2-enoate