Using CNCCN, COc1cc(C(=O)Nc2ccc(Br)cn2)c(NC(=O)c2ccc(C#N)cc2)c(OC)c1OC to produce COc1cc(C(=O)Nc2ccc(Br)cn2)c(NC(=O)c2ccc(C3=NCCN3C)cc2)c(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.