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