乙酸酐   、                                                                                      (2S,3R,4S,2'R,3'S,2''S,3''R,4''R)-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,
                                                                                                                                                                                                                            生成                                                 
(2R,3S)-2,3-trans-3-acetoxy-6-<(2S,3R,4S)-2,3-trans-3,4-cis-3-acetoxy-3',4',7-trimethoxyflavan-4-yl>-8-<(2S,3R,4R)-2,3-trans-3,4-trans-3-acetoxy-3',4',7-trimethoxyflavan-4-yl>-3',4',5,7-tetramethoxyflavan