InChI=1/C16H18N4O3S/c1-11-6-8-14(9-7-11)24(22,23)16(15(21)18-17)20-19-13-5-3-4-12(2)10-13/h3-10,19H,17H2,1-2H3,(H,18,21)/b20-16+/f/h18H B908A814A5871A4D