InChI=1S/C20H34O9/c1-2-3-4-5-6-7-8-9-10-11-12(21)13(19(25)26)17-15(23)14(22)16(24)18(29-17)20(27)28/h13-18,22-24H,2-11H2,1H3,(H,25,26)(H,27,28)