InChI=1S/C22H20O12/c1-31-17-10(24)7-9(23)11-12(25)19(16(32-18(11)17)8-5-3-2-4-6-8)33-22-15(28)13(26)14(27)20(34-22)21(29)30/h2-7,13-15,20,22-24,26-28H,1H3,(H,29,30)