{(1R,2R,4S)-4-[(2R,3S)-4-{2-[(E)-(R)-3-((R)-2,2-Dimethyl-[1,3]dioxolan-4-yl)-1-methyl-but-2-enyl]-[1,3]dithian-2-yl}-3-(4-methoxy-benzyloxy)-2-methyl-butyl]-2-methoxy-cyclohexyloxy}-triisopropyl-silane