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