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