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