3,6-Dibromo-1,2:4,5-benzenetetracarboxylic dianhydride;3,6-Dibrompyromellithsaeuredianhydrid;3,6-dibromopyromellitic acid dianhydride;1,4-dibromo-2,3,5,6-benzene tetracarboxylic acid dianhydride;Dianhydrid v. 3,6-Dibrompyromellitsaeure;