1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydro-, (3aR,7aS)-rel- 1,3-Isobenzofurandione, 3a,4,7,7a-tetrahydro-, cis- 54684-06-9 935-79-5 AI3-23866 EINECS 213-308-7 NSC 49672 cis-1,2,3,6-Tetrahydrophthalic anhydride cis-3a,4,7,7a-Tetrahydro-1,3-isobenzofurandione