1H-Pyrrole-2,5-dione, 1-(2-nitrophenyl)- (9CI) 2973-15-1 4-21-00-04632 (Beilstein Handbook Reference) AI3-28670 BRN 0188210 MALEIMIDE, N-(o-NITROPHENYL)- N-(o-Nitrophenyl)maleimide NSC 525229