InChI=1S/C20H34O9/c1-2-3-4-5-6-7-8-9-10-11-12-13(18(24)25)28-20-16(23)14(21)15(22)17(29-20)19(26)27/h9-10,13-17,20-23H,2-8,11-12H2,1H3,(H,24,25)(H,26,27)/b10-9-