| Poly[oxy-1,4-phenylene[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]-1,4-phenyleneoxy[2-(trifluoromethyl)-1,4-phenylene]iminocarbonyl(carboxyphenylene)[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene](carboxyphenylene)carbonylimino[3-(trifluoromethyl)-1,4- |
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