InChI=1S/C21H30O5S/c1-2-21(26-27(23,24)25)17-12-10-8-6-4-3-5-7-9-11-14-19-15-13-16-20(22)18-19/h2,6,8,12-13,15-18,21-22H,1,3-5,7,9-11,14H2,(H,23,24,25)/b8-6+,17-12+