| Poly[(4,6,7-trifluoro-1,3-dihydro-1,3-dioxo-2H-isoindole-5,2-diyl)[2,2'-bis(trifluoromethyl)[1,1'-biphenyl]-4,4'-diyl](4,6,7-trifluoro-1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)oxy-1,4-phenylene[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]-1,4-phenyle |
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