InChI=1S/C20H36O8/c1-14(12-10-8-6-4-2-3-5-7-9-11-13-21)27-20-17(24)15(22)16(23)18(28-20)19(25)26/h13-18,20,22-24H,2-12H2,1H3,(H,25,26)