[(4R,5S)-4-benzoyloxy-3-[(2R,3R,5S)-4-benzoyloxy-5-[(3S,4R)-4-benzoyloxy-6-(benzoyloxymethyl)-5-[tert-butyl(dimethyl)silyl]oxy-3-(1,3-dioxoisoindol-2-yl)oxan-2-yl]oxy-3-(1,3-dioxoisoindol-2-yl)-6-ethyloxan-2-yl]oxy-6-[(3S,5R,6S)-4-benzoyloxy-5-(1,3-dioxoisoindol-2-yl)-2-ethyl-6-methoxyoxan-3-yl]oxy-5-(1,3-dioxoisoindol-2-yl)oxan-2-yl]methyl benzoate