InChI=1S/C20H38O8/c1-14(21)12-10-8-6-4-2-3-5-7-9-11-13-27-20-17(24)15(22)16(23)18(28-20)19(25)26/h14-18,20-24H,2-13H2,1H3,(H,25,26)