[(2R,3R,4R,5R,6R)-3,4,5-triacetoxy-6-[(E)-3-[4-[2-[4-[(2R,3R,4R,5R,6R)-3,4,5-triacetoxy-6-(acetoxymethyl)tetrahydropyran-2-yl]phenyl]ethynyl]phenyl]allyl]tetrahydropyran-2-yl]methyl acetate