InChI=1/C12H10N4O4S/c17-7-3-1-6(2-4-7)9(18)16-13-5-8-10(19)14-12(21)15-11(8)20/h1-5,13,17H,(H,16,18)(H2,14,15,19,20,21)/p-1/fC12H9N4O4S/h14,16H/q-1/b8-5+ 12552D99E82BAA4D