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