InChI=1S/C21H24O9/c1-28-14-9-11(8-13(22)10-14)6-7-12-4-2-3-5-15(12)29-21-18(25)16(23)17(24)19(30-21)20(26)27/h2-5,8-10,16-19,21-25H,6-7H2,1H3,(H,26,27)