(2R,3S,4R,5S,6R)-3,4,5-tribenzyloxy-2-(benzyloxymethyl)-6-ethynyl-tetrahydropyran

trimethyl-[2-[(2R,3S,4R,5S,6R)-3,4,5-tribenzyloxy-6-(benzyloxymethyl)tetrahydropyran-2-yl]ethynyl]silane