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