InChI=1S/C21H30O5S/c1-2-3-4-6-10-16-21(26-27(23,24)25)17-11-8-5-7-9-13-19-14-12-15-20(22)18-19/h2,4,6,10,12,14-16,18,21-22H,1,3,5,7-9,11,13,17H2,(H,23,24,25)/b6-4+,16-10+