Acetic acid (R)-2-[(1R,2S)-2-(tert-butyl-diphenyl-silanyloxymethyl)-1-methyl-5-oxo-cyclopentyl]-1-((3aS,5aR,6S,9aS,9bR)-5a-formyl-2,2-dimethyl-5,8-dioxo-decahydro-naphtho[1,2-d][1,3]dioxol-6-yl)-ethyl ester

(3S,3aR,5R,5aS,5bS,9aS,10aS,13aR,13bS,15aR,15bS)-3-(((tert-butyldiphenylsilyl)oxy)methyl)-15b-hydroxy-3a,8,8,12,12-pentamethyl-15-oxohexadecahydro-6H-cyclopenta[7,8][1,3]dioxolo[4',5':1,2]phenanthro[4,4a-d][1,3]dioxin-5-yl acetate

(3S,3aR,5R,5aS,5bR,9aS,10aS,13aR,13bS,15aR,15bS)-3-(((tert-butyldiphenylsilyl)oxy)methyl)-15b-hydroxy-3a,8,8,12,12-pentamethyl-15-oxo-14-(phenylselanyl)hexadecahydro-6H-cyclopenta[7,8][1,3]dioxolo[4',5':1,2]phenanthro[4,4a-d][1,3]dioxin-5-yl acetate