InChI=1S/C14H16BrN4O2/c1-18-6-10(19(2)14(18)16)11-8-5-7(15)3-4-9(8)17-12(11)13(20)21/h3-5,10,17H,6,16H2,1-2H3,(H,20,21)/t10-/m1/s1