InChI=1S/C19H26O7S/c1-3-5-6-7-8-9-10-14-18(26-27(22,23)24)15-12-11-13-17(4-2)25-19(21)16-20/h4,10,14,17-18,20H,2-3,5-9,16H2,1H3,(H,22,23,24)/b14-10+