InChI=1S/C21H32O8/c1-9-8-10(20(2,3)4)12(22)11(21(5,6)7)16(9)28-19-15(25)13(23)14(24)17(29-19)18(26)27/h8,13-15,17,19,22-25H,1-7H3,(H,26,27)