Using ClCc1ccccc1, O=C(NC(CC1C(=O)Nc2ccccc21)C(=O)O)c1ccc(Cl)cc1 to produce O=C(NC(CC1C(=O)N(Cc2ccccc2)c2ccccc21)C(=O)O)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.