4,7-methanoisobenzofuran-1,3-dione, hexahydro-8-(1-methylethylidene)-, (3aR,4R,7S,7aS)- InChI=1/C12H14O3/c1-5(2)8-6-3-4-7(8)10-9(6)11(13)15-12(10)14/h6-7,9-10H,3-4H2,1-2H3/t6-,7+,9+,10 rel-(3aR,4R,7S,7aS)-8-(1-methylethylidene)hexahydro-4,7-methano-2-benzofuran-1,3-dione