InChI=1S/C21H30O5S/c1-2-3-4-9-15-20-21(25-20)16-10-7-5-6-8-12-18-13-11-14-19(17-18)26-27(22,23)24/h2,4,9,11,13-14,17,20-21H,1,3,5-8,10,12,15-16H2,(H,22,23,24)/b9-4+