InChI=1S/C22H38O8/c1-22(30-21-18(26)16(24)17(25)19(29-21)20(27)28)13-11-9-7-5-3-2-4-6-8-10-12-15(23)14-22/h16-19,21,24-26H,2-14H2,1H3,(H,27,28)