乙酸酐   、                                                                                      
7-<6'-O-(α-L-rhamnopyranosyl)-2'-O-(p-coumaroyl)-β-D-glucopyranosyloxy>coumarin                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                                                            生成                                                 (E)-3-(4-Acetoxy-phenyl)-acrylic acid (2S,3R,4S,5R,6R)-4,5-diacetoxy-2-(2-oxo-2H-chromen-7-yloxy)-6-((2R,3R,4R,5S,6S)-3,4,5-triacetoxy-6-methyl-tetrahydro-pyran-2-yloxymethyl)-tetrahydro-pyran-3-yl ester