InChI=1S/C24H16O8/c1-9-18(26)16-17(23(31-2)19(9)27)21(29)13-11(20(16)28)8-12(25)14-15(13)22(32-24(14)30)10-6-4-3-5-7-10/h3-8,22,25-27H,1-2H3/t22-/m1/s1