InChI=1S/C22H20O12/c1-31-13-3-2-8(14-6-10(23)9-5-11(24)12(25)7-15(9)32-14)4-16(13)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)