| Poly[[1,3-dihydro-7-(methylsulfonyl)-1,3-dioxo-2H-isoindole-2,5-diyl][2,2,2-trifluoro-1-(trifluoromethyl)ethylidene][1,3-dihydro-7-(methylsulfonyl)-1,3-dioxo-2H-isoindole-5,2-diyl][2-(trifluoromethoxy)-1,4-phenylene]oxy[3-(trifluoromethoxy)-1,4-phenylene] |
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