InChI=1/C13H13FN2O4S/c1-8-7-12(9(2)20-8)13(17)15-16-21(18,19)11-5-3-10(14)4-6-11/h3-7,16H,1-2H3,(H,15,17)/f/h15H 141AEC612A083FEF