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(3S,8R,9S,10R,13S,14S,15S,16S)-3-(tert-Butyl-diphenyl-silanyloxy)-17-eth-(E)-ylidene-10,13-dimethyl-15-triethylsilanyloxy-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-16-ol
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(R)-3-[(3S,8R,9S,10R,13R,14S,15R,17R)-3-(tert-Butyl-diphenyl-silanyloxy)-10,13-dimethyl-15-triethylsilanyloxy-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-butyric acid ethyl ester
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(R)-3-[(3S,8R,9S,10R,13S,14S,15R)-3-(tert-Butyl-diphenyl-silanyloxy)-10,13-dimethyl-15-triethylsilanyloxy-2,3,4,7,8,9,10,11,12,13,14,15-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]-butyric acid ethyl ester
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tert-Butyl-[(3S,8R,9S,10R,13S,14S,15S,16R)-17-eth-(E)-ylidene-10,13-dimethyl-2,3,4,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-20-oxa-cyclopropa[15,16]cyclopenta[a]phenanthren-3-yloxy]-diphenyl-silane
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(3S,8R,9S,10R,13S,14S,15S,16S)-3-(tert-Butyl-diphenyl-silanyloxy)-10,13-dimethyl-1,2,3,4,7,8,9,10,11,12,13,14,15,16-tetradecahydro-20-oxa-cyclopropa[15,16]cyclopenta[a]phenanthren-17-one