InChI=1S/C20H38O5S/c1-20(25-26(22,23)24)18-16-14-12-10-8-6-4-2-3-5-7-9-11-13-15-17-19-21/h4,6,19-20H,2-3,5,7-18H2,1H3,(H,22,23,24)/b6-4+