InChI=1S/C20H34O9/c1-12(22)9-7-5-3-2-4-6-8-10-14(23)13(11-21)18-16(25)15(24)17(26)19(29-18)20(27)28/h11-13,15-19,22,24-26H,2-10H2,1H3,(H,27,28)