Using NCC(=O)NC(c1ccccc1)c1ccc(Cl)cc1, O=C(Cl)c1cccc(Cl)c1 to produce O=C(CNC(=O)c1cccc(Cl)c1)NC(c1ccccc1)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.