Acetic acid (2S,3R,4S,5R,6S)-5-acetoxy-2-acetoxymethyl-4-benzyloxy-6-bromo-tetrahydro-pyran-3-yl ester 、 [(2R,3R,4R,5R,6S)-4-acetyloxy-3-hydroxy-6-methoxy-5-(phenylmethoxycarbonylamino)oxan-2-yl]methyl benzoate 生成 [(2R,3R,4R,5R,6S)-4-acetyloxy-3-[(2S,3R,4S,5R,6S)-3,5-diacetyloxy-6-(acetyloxymethyl)-4-phenylmethoxyoxan-2-yl]oxy-6-methoxy-5-(phenylmethoxycarbonylamino)oxan-2-yl]methyl benzoate