InChI=1S/C21H32O8/c1-9-4-5-11-13(20(11,2)8-22)12-10(9)6-7-21(12,3)29-19-16(25)14(23)15(24)17(28-19)18(26)27/h11-17,19,22-25H,4-8H2,1-3H3,(H,26,27)