InChI=1S/C21H36O5/c1-2-3-4-5-6-8-11-14-19(24)15-12-9-7-10-13-16-21(25)26-20(17-22)18-23/h3-4,6,8,11,14,19-20,22-24H,2,5,7,9-10,12-13,15-18H2,1H3/b4-3+,8-6+,14-11+