InChI=1/C13H12N2O5S/c1-20-10-3-2-8-6-12(16)11(5-9(8)4-10)15-7-13(17)14-21(15,18)19/h2-6,16H,7H2,1H3,(H,14,17)/p-1/fC13H11N2O5S/h16h,14H/q-1 6694E8F43FE744B0