1-(4-(Phenylazo)phenyl)-1H-pyrrole-2,5-dione 16201-96-0 1H-Pyrrole-2,5-dione, 1-(4-(phenylazo)phenyl)- 4-Phenylazophenylmaleimide EINECS 240-330-4 Maleimide, N-(p-(phenylazo)phenyl)- N-(p-Phenylazophenyl)maleimide NSC 6511