InChI=1S/C22H22O11/c1-9-14(32-22-19(29)17(27)18(28)20(33-22)21(30)31)8-13(25)15(16(9)26)12(24)6-5-10-3-2-4-11(23)7-10/h2-8,17-20,22-23,25-29H,1H3,(H,30,31)/b6-5+