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