InChI=1S/C21H16O12/c22-9-3-1-2-7-11(9)14(24)12-8(13(7)23)4-6(19(28)29)5-10(12)32-21-17(27)15(25)16(26)18(33-21)20(30)31/h1-5,15-18,21-22,25-27H,(H,28,29)(H,30,31)