| Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-5,2-diyl)[2,6-bis(1-methylethyl)-1,4-phenylene]methylene[3,5-bis(1-methylethyl)-1,4-phenylene](1,3-dihydro-1,3-dioxo-2H-isoindole-2,5-diyl)carbonyloxy-1,4-phenylene(1-methylethylidene)-1,4-phenyleneoxycarbonyl] |
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