| Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene](1,3-dihydro-1,3-dioxo-2H-isoindole-5,2-diyl)(3-methyl-1,4-phenylene)oxy(2-methyl-1,4-phenylene)-9H-fluoren-9-ylidene(3-methyl-1,4-phenylene)oxy(2-methyl-1,4- |
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