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