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