InChI=1S/C17H26O6S/c1-3-5-6-7-8-9-10-11-14(23-24(19,20)21)12-13-16-17(22-16)15(18)4-2/h4,10-11,14-18H,2-3,5-9H2,1H3,(H,19,20,21)/b11-10+