Using CCOC(=O)CNC(C)C, O=C(Cl)c1cc(Cl)cc(Cl)c1 to produce CCOC(=O)CN(C(=O)c1cc(Cl)cc(Cl)c1)C(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.