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