InChI=1S/C21H32O8/c1-9-11-4-6-21(3)7-5-12(10(2)14(21)18(11)29-19(9)26)27-20-17(25)16(24)15(23)13(8-22)28-20/h9,11-13,15-18,20,22-25H,4-8H2,1-3H3