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