InChI=1S/C20H22O13/c1-4-6(5(2)21)10(23)8-7(9(4)22)11(24)16(31-3)17(12(8)25)32-20-15(28)13(26)14(27)18(33-20)19(29)30/h7,13-18,20,25-28H,1-3H3,(H,29,30)