InChI=1S/C22H24O11/c23-9-17-19(28)20(29)21(30)22(33-17)32-16-5-2-12(8-15(16)26)10-31-18(27)6-3-11-1-4-13(24)14(25)7-11/h1-8,17,19-26,28-30H,9-10H2/b6-3+