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