2-[4-(5-Bromo-9,9-dimethylxanthen-4-yl)phenyl]-4,5-dihydro-1,3-oxazole   、                                                                                      
   、                                                                                      
silver(l) oxide                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                                                        以99%的产率得到silver;2-[4-[5-[4-[3-[2,6-di(propan-2-yl)phenyl]-4,5-dihydro-2H-imidazol-3-ium-2-id-1-yl]-3,5-di(propan-2-yl)phenyl]-9,9-dimethylxanthen-4-yl]phenyl]-4,5-dihydro-1,3-oxazole;chloride