1,2,4,5-Benzenetetracarboxylic 1,2:4,5-diimide, N,N'-bis(m-chlorophenyl)- 6626-73-9 Benzo[1,2-c:4,5-c']dipyrrole-1,3,5,7(2H,6H)-tetrone, 2,6-bis(3-chlorophenyl)- NSC58281