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