1,2,4,5-Benzenetetracarboxylic 1,2:4,5-diimide 1,2,4,5-Benzenetetracarboxylic acid diimide 2550-73-4 Benzene-1,2:4,5-tetracarboxydiimide Benzo(1,2-c:4,5-c')dipyrrole-1,3,5,7(2H,6H)-tetrone EINECS 219-852-1 NSC 55160 Pyromellitic acid diimide Pyromellitic diimide Pyromellitimide