InChI=1S/C25H16O9/c1-12(26)31-14-6-8-17-20(10-14)33-21-11-15(32-13(2)27)7-9-18(21)25(17)19-5-3-4-16(23(28)29)22(19)24(30)34-25/h3-11H,1-2H3,(H,28,29)