InChI=1/C12H11N4O4S/c1-6-11(7(2)15-14-6)21(18,19)16-8-3-4-9-10(5-8)20-12(17)13-9/h3-5H,1-2H3,(H,13,17)(H,14,15)/q-1/f/h13-14H 5D05981CC0189401