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