1H-Pyrrole-2,5-dione, 1,1'-(1,3-propanediyl)bis- 28537-69-1 Maleimide, N,N'-trimethylenedi- N,N'-Trimethylenebismaleimide N,N'-Trimethylenedimaleimide NSC44746 Trimethylenebismaleimide