Using O=C1NC(=O)c2ccccc21, Clc1cccc(-c2ccc(CBr)cc2)n1 to produce O=C1c2ccccc2C(=O)N1Cc1ccc(-c2cccc(Cl)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.