Synonyms: Poly[(5,7-dihydro-1,3,5,7-tetraoxobenzo[1,2-c:4,5-c']dipyrrole-2,6(1H,3H)-diyl)-p-phenyleneoxy-p-phenyleneoxy-p-phenylene](8CI); Benzo[1,2-c:4,5-c']dipyrrole, deriv., polymer;1,4-Bi(4-aminophenoxy)benzene-pyromellitic acid dianhydride copolymer, SRU;1,4-Bis(4-aminophenoxy)benzene-N,N'-dimethyl pyromellitic bisimide copolymer,sru; 1,4-Bis(4-aminophenoxy)benzene-pyromellitic dianhydride copolymer, SRU;1,4-Bis(4-aminophenoxy)benzene-pyromellitic dianhydride copolymer, polyimidesru; 4,4'-(p-Phenylenedioxy)bisaniline-pyromellitic dianhydride copolymer, sru;4,4'-(p-Phenylenedioxy)dianiline-pyromellitic dianhydride copolymer, SRU;Hydroquinone bis(4-aminophenyl) ether-pyromellitic dianhydride copolymer, SRU;Hydroquinone bis(4-aminophenyl) ether-pyromellitic dianhydride polymer, SRU; PFG