2,2-Dimethyl-propionic acid (2R,3R,4R,5R,6R)-7-(tert-butyl-diphenyl-silanyloxy)-3,5-dihydroxy-2,4,6-trimethyl-heptyl ester

{(2R,3R)-3-[(R)-1-((4S,5R)-2,2,5-Trimethyl-[1,3]dioxan-4-yl)-ethyl]-oxiranyl}-methanol