Using COC(=O)Cc1ccc(OCC(C)=O)cc1, NCC(O)c1ccc(Cl)cc1 to produce COC(=O)Cc1ccc(OCC(C)NCC(O)c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.