Carbonic acid tert-butyl ester (S)-1-(tert-butyl-diphenyl-silanyloxymethyl)-1-methyl-but-3-enyl ester

triisopropylsilyl 2-((2R,4S,6S,8S,10S)-4-acetoxy-8-((R)-4-((4-methoxybenzyl)oxy)-3-methyl-2-methylenebutyl)-10-methyl-10-((triethylsilyl)oxy)-1,7-dioxaspiro[5.5]undecan-2-yl)acetate

(R)-1-((S)-2,2-Diethyl-[1,3]dioxolan-4-yl)-4-methylene-hexan-2-ol

(2S,4S,7R)-1-(tert-Butyl-diphenyl-silanyloxy)-8-(4-methoxy-benzyloxy)-2,7-dimethyl-6-methylene-octane-2,4-diol