InChI=1S/C23H20O13/c1-31-11-6-9-12-17(35-18(9)16(27)19(11)32-2)8-4-3-7(5-10(8)34-22(12)30)33-23-15(26)13(24)14(25)20(36-23)21(28)29/h3-6,13-15,20,23-27H,1-2H3,(H,28,29)