| Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-5,2-diyl)[2,2'-bis(trifluoromethyl)[1,1'-biphenyl]-4,4'-diyl](1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)carbonylimino-1,4-phenyleneoxy-1,4-phenylene(octahydro-4,7-methano-5H-inden-5-ylidene)-1,4-phenyleneoxy-1,4- |
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