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