InChI=1S/C20H34O9/c21-11-9-7-5-3-1-2-4-6-8-10-14(23)13(12-22)18-16(25)15(24)17(26)19(29-18)20(27)28/h12-13,15-19,21,24-26H,1-11H2,(H,27,28)