InChI=1S/C19H26O7S/c1-3-18(25-17(2)21)13-10-11-15-19(26-27(22,23)24)14-9-7-5-4-6-8-12-16-20/h3,9,14,18-20H,1,4-8,12,16H2,2H3,(H,22,23,24)/b14-9+