InChI=1S/C21H22O11/c1-21(8-29-20-16(25)14(23)15(24)18(31-20)19(26)27)6-5-10-12(32-21)7-11-9(17(10)28-2)3-4-13(22)30-11/h3-7,14-16,18,20,23-25H,8H2,1-2H3,(H,26,27)