Synonyms: 1H,3H-Benzo1,2-c:4,5-cdifuran-1,3,5,7-tetrone, polymer with 1,2-benzenediamine, 1,3-benzenediamine, 1,4-benzenediamine, 4-4-1-4-(1,3-dihydro-1,3-dioxo-5-isobenzofuranyl)oxyphenyl-1-methylethylphenoxy-1,3-isobenzofurandione, 1,3-isobenzofurandione, 4,4-(1-;MODIFIED POLYETHERIMIDE;1H,3H-Benzo[1,2-c:4,5-c’]difuran-1,3,5,7-tetrone, polymer with 1,2-benzenediamine, 1,3-benzenediamine, 1,4-benzenediamine, 4-[4-[1-[4-[(1,3-dihydro- 1,3-dioxo-5-isobenzofuranyl)oxy]phenyl]-1-methylethyl ]phenoxy]-1,3-isobenzofurandione, 1,3-isobenzofurand;1H,3H-Benzo(1,2-c:4,5-c)difuran-1,3,5,7-tetrone, polymer with 1,2-benzenediamine, 1,3-benzenediamine, 1,4-benzenediamine, 4-(4-(1-(4-((1,3-dihydro-1,3-dioxo-5-isobenzofuranyl)oxy)phenyl)-1-methylethyl)phenoxy)-1,3-isobenzofurandione, 1,3-isobenzofurandione, 4,4-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(1,3-isobenzofurandione) and 5,5-((1-methylethylidene)bis(4,1-phenyleneoxy))bis(1,3-isobenzofurandione)