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