Synonyms: Pyrrolo3,4-cpyrrole-1,4-dione, 3,6-bis4-(1,1-dimethylethyl)phenyl-2,5-dihydro-;3,6-Bis[4-(1,1-dimethylethyl)phenyl]-2,5-di- hydropyrrolo[3,4-c]pyrrole-1,4-di-one;3,6-Bis(4-tert-butylphenyl)-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione;C.I. 561170;