{[[4-(3-Bromo-2,4,6-trimethyl-phenylamino)-9,10-dioxo-9,10-dihydro-anthracen-1-yl]-(2,4,6-trimethyl-phenyl)-amino]-methylene}-dimethyl-ammonium; chloride                                                                                                                                                              在
                                                                                                                                                                                 
sodium hydroxide   、                                                                                                  
硫酸   、                                                                                                  
溴                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 0.5h,
                                                                                                                生成                                                 
1-(3-Bromo-2,4,6-trimethyl-phenylamino)-4-(3,5-dibromo-2,4,6-trimethyl-phenylamino)-anthraquinone