Using O=C1NC(=O)c2ccccc21, CCC(Br)C(=O)Nc1c(C)cccc1C to produce CCC(C(=O)Nc1c(C)cccc1C)N1C(=O)c2ccccc2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.