InChI=1S/C22H22O11/c23-9-11-13(25)8-14(32-22-19(29)17(27)18(28)20(33-22)21(30)31)15(16(11)26)12(24)7-6-10-4-2-1-3-5-10/h1-8,17-20,22-23,25-29H,9H2,(H,30,31)/b7-6+