InChI=1/C12H10Br2N4O2S/c1-5-10(21-12(15)17-5)11(20)18-16-4-6-2-7(13)9(19)8(14)3-6/h2-4,19H,1H3,(H2,15,17)(H,18,20)/b16-4+/f/h18H,15H2 A46C3E4CE0A2FEEA