InChI=1S/C21H38O5/c1-2-3-4-5-7-10-13-19-20(26-19)14-11-8-6-9-12-15-21(24)25-18(16-22)17-23/h7,10,18-20,22-23H,2-6,8-9,11-17H2,1H3/b10-7-