InChI=1/C16H19BrN4O2/c1-11(21(2)13-6-4-3-5-7-13)9-19-16(23)20-14-8-12(17)10-18-15(14)22/h3-8,10-11H,9H2,1-2H3,(H,18,22)(H2,19,20,23)/t11-/m1/s1/f/h18-20H 4DFFF8B60DDAA2C5