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