Using CN, CCC(=O)N1CCC(c2cnc(N)c(-c3nnc(-c4ccc(CBr)cc4)o3)n2)CC1 to produce CCC(=O)N1CCC(c2cnc(N)c(-c3nnc(-c4ccc(CNC)cc4)o3)n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.