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