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