InChI=1S/C20H40O5S/c1-2-3-4-5-6-8-11-14-17-20(21)18-15-12-9-7-10-13-16-19-25-26(22,23)24/h14,17,20-21H,2-13,15-16,18-19H2,1H3,(H,22,23,24)/b17-14+