Synonyms: 4,7-Methanoisobenzofuran-1,3-dione,3a,4,7,7a-tetrahydro-, (3aa,4b,7b,7aa)-; 5-Norbornene-2,3-dicarboxylic anhydride, cis-exo- (8CI);Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid exo-anhydride; Himic anhydride;NSC 110659; cis-5-Norbornene-exo-2,3-dicarboxylic anhydride;cis-Norbornene-exo-2,3-dicarboxylic anhydride; exo-3,6-Methylene-1,2,3,6-tetrahydrophthalicanhydride; exo-3,6-Methylene-4-cyclohexene-1,2-dicarboxylic anhydride;exo-5-Norbornene-1,2-dicarboxylic anhydride; exo-5-Norbornene-2,3-dicarboxylicanhydride; exo-Nadic anhydride; exo-cis-3,6-endo-Methylene-D4-tetrahydrophthalic anhydride;exo-cis-5-Norbornene-2,3-dicarboxylic anhydride