1-[(2S,4S,6R,8R,10S)-8-Benzyloxymethyl-10-(tert-butyl-dimethyl-silanyloxy)-4-methoxy-1,7-dioxa-spiro[5.5]undec-2-yl]-butan-2-one

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

Acetic acid (2R,4S,6S,8S,10S)-8-[(R)-4-(4-methoxy-benzyloxy)-3-methyl-2-methylene-butyl]-10-methyl-2-(2-oxo-ethyl)-10-triethylsilanyloxy-1,7-dioxa-spiro[5.5]undec-4-yl ester

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