4,7-Epoxyisobenzofuran-1,3-dione, 5,6-dibromohexahydro- 51371-59-6 7-Oxabicyclo[2.2.1]heptane-2,3-dicarboxylic anhydride, 5,6-dibromo-, (E)- NSC23791 Phthalic anhydride, hexahydro-4,5-dibromo-3,6-endoxo-, (E)- WLN: T C555 A AO DVOVTJ IE JE trans-4,5-Dibromo-3,6-endoxohexahydrophthalic anhydride