InChI=1S/C21H24O8/c1-10(2)11-3-4-12(8-22)14-6-5-13(15(14)7-11)9-28-21-18(25)16(23)17(24)19(29-21)20(26)27/h3-7,16-19,21-25H,1,8-9H2,2H3,(H,26,27)