Synonyms: 1,3-Isobenzofurandione,3a,4,7,7a-tetrahydro-, cis-; 4-Cyclohexene-1,2-dicarboxylic anhydride, cis- (8CI);NSC 49672; cis-1,2,3,6-Tetrahydrophthalic acid anhydride;cis-1,2,3,6-Tetrahydrophthalic anhydride; cis-4-Cyclohexene-1,2-dicarboxylicacid anhydride; cis-4-Cyclohexene-1,2-dicarboxylic anhydride; cis-D4-Tetrahydrophthalic anhydride