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