| Poly[[3-(4-nitrophenyl)-7,2-quinoxalinediyl]-1,4-phenyleneoxy-1,4-phenylene[3-(4-nitrophenyl)-2,7-quinoxalinediyl]oxy-1,4-phenyleneiminocarbonyl[5-(4,5,6,7-tetrachloro-1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-1,3-phenylene]carbonylimino-1,4-phenyleneoxy] |
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