1H-Pyrrole-2,5-dione, 1-methyl- 5-21-10-00005 (Beilstein Handbook Reference) 930-88-1 AI3-22153 BRN 0108550 EINECS 213-226-1 Maleimide, N-methyl- N-Methylmaleimide N-Methylmaleinimide NSC 57594