InChI=1S/C21H22O11/c1-29-13-3-2-8(6-12(13)23)17-18(31-17)9-4-10(22)7-11(5-9)30-21-16(26)14(24)15(25)19(32-21)20(27)28/h2-7,14-19,21-26H,1H3,(H,27,28)