Using CC(=O)N1CC(O)C1, Nc1nccc(-n2c(C(Cl)(Cl)Cl)nc3ccc(Br)cc32)n1 to produce CC(=O)N1CC(Oc2nc3ccc(Br)cc3n2-c2ccnc(N)n2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.