InChI=1/C12H10N4O4S/c1-6-2-3-8(9(4-6)16(19)20)13-5-7-10(17)14-12(21)15-11(7)18/h2-5,13H,1H3,(H2,14,15,17,18,21)/f/h14-15H 973DC0E318064BFC