InChI=1S/C21H16O11/c22-6-7-4-9-13(15(25)12-8(14(9)24)2-1-3-10(12)23)11(5-7)31-21-18(28)16(26)17(27)19(32-21)20(29)30/h1-6,16-19,21,23,26-28H,(H,29,30)