InChI=1S/C21H16O13/c22-5-1-2-6-8(3-5)32-20(30)11-10-9(31-16(6)11)4-7(23)12(24)17(10)33-21-15(27)13(25)14(26)18(34-21)19(28)29/h1-4,13-15,18,21-27H,(H,28,29)