(2S,3S,4S,5R)-4,5-Bis-benzyloxy-6-[(2S,3R,4S,5R)-4,5-diacetoxy-2-((3R,4S,5R,6R)-4,5-diacetoxy-6-methoxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-yloxy]-3-methoxy-tetrahydro-pyran-2-carboxylic acid methyl ester 在
吡啶 作用下,
生成
(2S,3S,4S,5R,6S)-4,5-Bis-benzyloxy-6-[(2S,3R,4S,5R)-4,5-diacetoxy-2-((3R,4S,5R,6R)-4,5-diacetoxy-6-methoxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-yloxy]-3-methoxy-tetrahydro-pyran-2-carboxylic acid methyl ester