InChI=1S/C21H30O5S/c1-2-3-9-15-20(22)16-11-8-6-4-5-7-10-13-19-14-12-17-21(18-19)26-27(23,24)25/h2,9,11-12,14-18,20,22H,1,3-8,10,13H2,(H,23,24,25)/b15-9+,16-11+