InChI=1S/C20H20O11/c1-8(21)3-4-9-11(28-2)7-12-10(5-6-13(22)29-12)17(9)30-20-16(25)14(23)15(24)18(31-20)19(26)27/h3-7,14-16,18,20,23-25H,1-2H3,(H,26,27)