InChI=1S/C21H24O11/c22-8-14-16(27)18(29)19(30)21(31-14)32-20-13(26)7-12(25)15(17(20)28)11(24)6-3-9-1-4-10(23)5-2-9/h1-7,11,14,16,18-19,21-30H,8H2/b6-3+