| Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-5,2-diyl)-1,4-phenyleneoxynaphthalenediyloxy-1,4-phenylene(1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)carbonylimino-1,4-phenyleneoxy-1,4-phenylene(1-phenylethylidene)-1,4-phenyleneoxy-1,4-phenyleneiminocarbonyl] |
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