InChI=1S/C19H19NO6S/c1-20-10-16(26-27(21,22)23)13-9-15(24-2)19(25-3)18-12-7-5-4-6-11(12)8-14(20)17(13)18/h4-9,16H,10H2,1-3H3,(H,21,22,23)