InChI=1S/C18H20O13/c1-25-10-5(3-6-12(14(10)26-2)28-4-27-6)11-15(29-11)17(24)31-18-9(21)7(19)8(20)13(30-18)16(22)23/h3,7-9,11,13,15,18-21H,4H2,1-2H3,(H,22,23)