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