乙酸酐 、 (2R,3S,4R,2'R,3'S,2''R,3''S,4''S)-2,2',2''-Tris-(3,4-dimethoxy-phenyl)-7,5',7',7''-tetramethoxy-3,4,3',4',3'',4''-hexahydro-2H,2'H,2''H-[4,6';8',4'']terchromene-3,3',3''-triol 在
吡啶 作用下,
以142 mg的产率得到(2R,3S)-2,3-trans-3-acetoxy-6-<(2R,3S,4R)-2,3-trans-3,4-cis-3-acetoxy-3',4',7-trimethoxyflavan-4-yl>-8-<(2R,3S,4S)-2,3-trans-3,4-trans-3-acetoxy-3',4',7-trimethoxyflavan-4-yl>-3',4',5,7-tetramethoxyflavan