InChI=1S/C21H32O8/c1-10-7-11(20(2,3)4)16(12(8-10)21(5,6)9-22)28-19-15(25)13(23)14(24)17(29-19)18(26)27/h7-8,13-15,17,19,22-25H,9H2,1-6H3,(H,26,27)