1,3-Isobenzofurandione, polymer with 2,5-furandione, 2,2'-oxybis(ethanol) and 3a,4,7,7a-tetrahydro-4,7-methano-1H-indene 68541-30-0 Diethylene glycol, phthalic anhydride, maleic anhydride, dicyclopentadiene polymer