InChI=1S/C21H18O11/c22-9-3-1-2-8(6-9)13-7-11(24)14-12(30-13)5-4-10(23)18(14)31-21-17(27)15(25)16(26)19(32-21)20(28)29/h1-7,15-17,19,21-23,25-27H,(H,28,29)