InChI=1S/C20H22O9/c1-9(2)3-6-11-12(7-4-10-5-8-13(21)28-17(10)11)27-20-16(24)14(22)15(23)18(29-20)19(25)26/h3-5,7-8,14-16,18,20,22-24H,6H2,1-2H3,(H,25,26)