| Poly[oxy[(trifluoromethyl)-1,3-phenylene]oxy(2',3',4',5',6'-pentafluoro[1,1'-biphenyl]-4,2-diyl)iminocarbonyl-1,4-phenylene[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]-1,4-phenylenecarbonylimino(2',3',4',5',6'-pentafluoro[1,1'-biphenyl]-2,4-diyl)] |
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