(R)-4-[(3S,5R,8R,9S,10S,13R,14S,17R)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-14-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-((R)-hydroxy-phenyl-methyl)-5H-furan-2-one
4-[(3S,5R,8R,9S,10S,13R,14S,17R)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-14-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-(hydroxy-phenyl-methyl)-5H-furan-2-one
Benzoic acid (R)-{(R)-3-[(3S,5R,8R,9S,10S,13R,14S,17R)-3-(tert-butyl-dimethyl-silanyloxy)-10,13-dimethyl-14-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-oxo-2,5-dihydro-furan-2-yl}-phenyl-methyl ester
Benzoic acid {3-[(3S,5R,8R,9S,10S,13R,14S,17R)-3-(tert-butyl-dimethyl-silanyloxy)-10,13-dimethyl-14-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-oxo-2,5-dihydro-furan-2-yl}-phenyl-methyl ester
4-[(3S,5R,8R,9S,10S,13R,14S,17S)-3-(tert-Butyl-dimethyl-silanyloxy)-10,13-dimethyl-14-trimethylsilanyloxy-hexadecahydro-cyclopenta[a]phenanthren-17-yl]-5-[1-phenyl-meth-(Z)-ylidene]-5H-furan-2-one