1,4-Epoxycyclohex-5-ene-2,3-dicarboxylic anhydride 3,6-Endoxo-delta'-tetrahydrophthalic anhydride 3a,4,7,7a-Tetrahydro-4,7-epoxyisobenzofuran-1,3-dione 5426-09-5 7-Oxabicyclo(2.2.1)-5-heptene-2,3-dicarboxylic anhydride 7-Oxabicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic anhydride EINECS 226-570-2 Furan-maleic anhydride Diels-Alder adduct Furan-maleic anhydride adduct Furan-maleic anhydride copolymer NSC 14002 NSC 231495 NSC 61997