methyl (3S,4R,6R)-6-[(3S,4R,6S)-5-azido-6-[(3R,4S,6R)-6-[(3S,4S,6S)-5-azido-2-(benzoyloxymethyl)-6-methoxy-4-phenylmethoxyoxan-3-yl]oxy-5-benzoyloxy-2-methoxycarbonyl-4-phenylmethoxyoxan-3-yl]oxy-2-ethyl-4-methyloxan-3-yl]oxy-3-[(2R,4S,5R)-3-azido-6-(benzoyloxymethyl)-4,5-bis(phenylmethoxy)oxan-2-yl]oxy-4,5-bis(phenylmethoxy)oxane-2-carboxylate