| Poly[oxy(2,2',3,3'-tetrahydro-3,3,3',3'-tetramethyl-1,1'-spirobi[1H-indene]-6,6'-diyl)oxy[5-(trifluoromethyl)-1,3-phenylene]iminocarbonyl-1,4-phenylene[2,2,2-trifluoro-1-(trifluoromethyl)ethylidene]-1,4-phenylenecarbonylimino[5-(trifluoromethyl)-1,3-pheny |
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