1,1-(Dithiodi-4,1-phenylene)bis-1H-pyrrole-2,5-dione 1H-Pyrrole-2,5-dione, 1,1-(dithiodi-4,1-phenylene)bis- (9CI) 39557-39-6 4,4'-Dithiobis(phenylmaleimide) Maleimide, N,N'-(dithiodi-p-phenylene)di-