61128-25-4

Poly[(1,3-dihydro-1,3-dioxo-2H-isoindole-5,2- diyl)-1,4-phenylene(1,3-dihydro-1,3-dioxo- 2H-isoindole-2,5-diyl)oxy-1,4-phenylene(1- methylethylidene)-1,4-phenyleneoxy]