InChI=1S/C21H18O11/c22-9-3-1-2-8(4-9)13-6-11(23)10-5-12(24)15(7-14(10)30-13)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)