InChI=1S/C20H20O10/c1-7-3-9-4-11-10(5-12(21)29-17(11)8(2)16(9)28-7)6-27-20-15(24)13(22)14(23)18(30-20)19(25)26/h3-5,13-15,18,20,22-24H,6H2,1-2H3,(H,25,26)