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