... -2,3-DICARBOXYLIC ANHYDRIDE;BICYCLO[2.2.1]HEPT-5-ENE-EXO-2,3-DICARBOXYLIC ANHYDRIDE;(1α,2α,3β,6{f1b})-1,2,3,6-tetrahydro-3,6 ... ,7at)-3a,4,7,7a-tetrahydro-4r,7c-methano-isobenzofuran-1,3-dione;3at,7at-3a,4,7,7a-tetrahydro-4r,7c ... -methano-isobenzofuran-1,3-dione;4,7-Methanoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-, (3aalpha,4beta ...