InChI=1S/C20H34O7S/c1-2-3-6-9-17(27-28(24,25)26)14-12-16-13-15-19(21)18(16)10-7-4-5-8-11-20(22)23/h12,14,16-18H,2-11,13,15H2,1H3,(H,22,23)(H,24,25,26)/b14-12+