InChI=1S/C21H18O11/c22-9-6-11(23)14-12(7-9)31-13(15(14)24)5-8-2-1-3-10(4-8)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)