Using O=C1NC(=O)c2ccccc21, ClCCCc1c[nH]c2ccc(Br)cc12 to produce O=C1c2ccccc2C(=O)N1CCCc1c[nH]c2ccc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.