InChI=1S/C21H18O11/c22-9-6-10-12(13(23)15(25)18(30-10)8-4-2-1-3-5-8)11(7-9)31-21-17(27)14(24)16(26)19(32-21)20(28)29/h1-7,14,16-17,19,21-22,24-27H,(H,28,29)