乙酸酐   、                                                                                      
5-Hydroxy-8-[5-(5-hydroxy-7-methoxy-4-oxo-chroman-2-yl)-2-methoxy-phenyl]-2-(3-hydroxy-4-methoxy-phenyl)-7-methoxy-chroman-4-one                                                                                                                                                              在
                                                                                                                                                                                 
吡啶                                                                                                                                  作用下,
                                                                                                                                                                                                                            以20 mg的产率得到Acetic acid 8-[5-(5-acetoxy-7-methoxy-4-oxo-chroman-2-yl)-2-methoxy-phenyl]-2-(3-acetoxy-4-methoxy-phenyl)-7-methoxy-4-oxo-chroman-5-yl ester