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