24327-08-0 4,7-Ethanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3a.alpha.,4.alpha.,7.alpha.,7a.alpha.)- Bicyclo[2.2.2]oct-5-ene-2,3-dicarboxylic anhydride, cis-endo- Bicyclo[2.2.2]oct-5-ene-2,3-dicarboxylic anhydride, endo- Bicyclo[2.2.2]octene-2,3-endo-dicarboxylic anhydride NSC238003 endo-Bicyclo[2.2.2]octenedicarboxcyclic acid anhydride