InChI=1/C13H12N2O5S/c1-19-8-3-7(4-9(5-8)20-2)11(16)15-13-14-10(6-21-13)12(17)18/h3-6H,1-2H3,(H,17,18)(H,14,15,16)/p-1/fC13H11N2O5S/h16H/q-1 98896ADE304C9D87