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