Synonyms: Poly[(1,1',3,3'-tetraoxo[5,5'-biisoindoline]-2,2'-diyl)-p-phenyleneoxy-p-phenylene](8CI); 1,1'-Biphenyl-3,3',4,4'-tetracarboxylic dianhydride-4,4'-oxybisanilinecopolymer, SRU; 3,3,4,4'-Biphenyltetracarboxylicdianhydride-4,4'-diaminodiphenyl ether copolymer, sru;3,3',4,4'-Biphenyltetracarboxy dianhydride-bis(4-aminophenyl) ether copolymer,SRU; 3,3',4,4'-Biphenyltetracarboxylic acid anhydride-4,4'-diaminodiphenylethercopolymer, sru; 3,3',4,4'-Biphenyltetracarboxylic aciddianhydride-4,4'-diaminodiphenyl ether copolymer, SRU; 3,3',4,4'-Biphenyltetracarboxylicacid dianhydride-4,4'-oxydianiline copolymer, sru;3,3',4,4'-Biphenyltetracarboxylic acid dianhydride-bis(4-aminophenyl) ethercopolymer, SRU; 3,3',4,4'-Biphenyltetracarboxylicdianhydride-4,4'-diacetamidodiphenyl ether copolymer sru; 3,3',4,4'-Biphenyltetracarboxylicdianhydride-4,4'-diaminodiphenyl ether copolymer, SRU;3,3',4,4'-Biphenyltetracarboxylic dianhydride-4,4'-oxydianiline copolymer, SRU;3,3',4,4'-Biphenyltetracarboxylic dianhyd