Using Nc1c(Cl)cc(C(=CC(=O)O)c2ccc(Cl)cc2)cc1Cl, C1COCCN1 to produce Nc1c(Cl)cc(C(=CC(=O)N2CCOCC2)c2ccc(Cl)cc2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.