Using O=C1CCC(=O)N1Br, Cc1cc(-c2noc(-c3sccc3Cl)n2)ccc1Cl to produce Clc1ccc(-c2noc(-c3sccc3Cl)n2)cc1CBr, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.