InChI=1S/C19H22O7S/c1-13(2)4-8-17(26-27(21,22)23)14(3)10-11-24-16-7-5-15-6-9-19(20)25-18(15)12-16/h4-7,9-10,12,17H,8,11H2,1-3H3,(H,21,22,23)/b14-10+