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