2,6-quinolinedione, octahydro- InChI=1/C14H18O8/c1-7-9(10(16)18-5)12(3)21-13(4,20-7)14(22-12,8(2)15)11(17)19-6/h1-6H dimethyl 7-acetyl-1,3,5-trimethyl-2,6,8-trioxabicyclo[3.2.1]oct-3-ene-4,7-dicarboxylate (non-preferred name)