InChI=1S/C16H18N4O3S/c21-16(19-14-3-1-7-17-11-14)13-5-9-20(10-6-13)24(22,23)15-4-2-8-18-12-15/h1-4,7-8,11-13H,5-6,9-10H2,(H,19,21)