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