1,1'-(Ethylenebis(thio-2,1-phenylene))bis-1H-pyrrole-2,5-dione 1,2-Ethylenebis((2-maleimidophenyl)thio ether) 1H-Pyrrole-2,5-dione, 1,1'-(1,2-ethanediylbis(thio-2,1-phenylene))bis- 68555-54-4 EINECS 271-430-6