[(1S)-1-[(3R,5R,8R,9S,10S,13S,14S,17S)-10,13-dimethyl-3-trimethylsilyloxy-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethoxy]-trimethylsilane;[(1S)-1-[(3R,5R,8R,9S,10S,13S,14S,17S)-10,13-dimethyl-3-trimethylsilyloxy-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethoxy]-trimethyl-silane
[(1S)-1-[(3R,5R,8R,9S,10S,13S,14S,17S)-10,13-dimethyl-3-trimethylsilyloxy-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethoxy]-trimethylsilane