InChI=1S/C21H20O11/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/h1-5,15-19,21-23,25-28H,6H2,(H,29,30)