InChI=1S/C21H32O8/c1-9(8-22)5-4-6-20(2)11-7-10-12(21(10,20)3)16(11)28-19-15(25)13(23)14(24)17(29-19)18(26)27/h5,10-17,19,22-25H,4,6-8H2,1-3H3,(H,26,27)/b9-5-