乙酸酐 、 (2R,3S)-2-(3,4-Dimethoxy-phenyl)-7-methoxy-6-((6aS,7S,12aS)-3,4,10-trimethoxy-5,6a,7,12a-tetrahydro-isochromeno[4,3-b]chromen-7-yl)-chroman-3-ol 以
吡啶 为溶剂,
生成
(2S,3S,4R)-2,3-cis-3,4-trans-4-<(2R,3S)-3-acetoxy-3',4',7-trimethoxyflavan-6-yl>-3',4',7-trimethoxymopanane