InChI=1S/C21H36O5/c1-2-3-11-14-19(23)15-12-9-7-5-4-6-8-10-13-16-21(25)26-18-20(24)17-22/h7,9,12,15,20,22,24H,2-6,8,10-11,13-14,16-18H2,1H3/b9-7-,15-12+/t20-/m0/s1