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