| 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-phenylenebicyclo[2.2.1]hept-2-ylidene-1,4-phenyleneoxy-1,4-phenyleneimino |
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