| Poly[(3-phenyl-7,2-quinoxalinediyl)-1,4-phenyleneoxy-1,4-phenylene(3-phenyl-2,7-quinoxalinediyl)oxy-1,4-phenyleneiminocarbonyl-1,4-phenylene(1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene](1,3-dihydro-1,3-dioxo- |
|
