InChI=1S/C20H36O9/c21-12-11-14(22)10-8-6-4-2-1-3-5-7-9-13-28-20-17(25)15(23)16(24)18(29-20)19(26)27/h15-18,20-21,23-25H,1-13H2,(H,26,27)