2-((4S,5R)-5-{(2R,3R,4S,5S,6R)-4-(tert-Butyl-dimethyl-silanyloxy)-6-[(R)-2-(tert-butyl-dimethyl-silanyloxy)-3-methoxy-propyl]-2-methoxy-3,5-dimethyl-tetrahydro-pyran-2-yl}-2,2-dimethyl-[1,3]dioxolan-4-yl)-ethanol