tert-butyl(((2R,4S,6R,8S,10S)-8-((E)-2-((dicyclohexylboraneyl)oxy)but-2-en-1-yl)-10-methoxy-2-(((4-methoxybenzyl)oxy)methyl)-1,7-dioxaspiro[5.5]undecan-4-yl)oxy)dimethylsilane

(4S,6R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-6-iodomethyl-4-methyl-[1,3]dioxan-2-one