(4S,5R)-5-[(1S,3R)-4-(tert-Butyl-dimethyl-silanyloxy)-1,3-dimethyl-butyl]-2-phenyl-[1,3]dioxolane-4-carboxylic acid ethyl ester

[(2R,4S,5R)-5-Benzyloxy-5-((R)-2,2-dimethyl-[1,3]dioxolan-4-yl)-2,4-dimethyl-pentyloxy]-tert-butyl-dimethyl-silane