Using COC(=O)[C@H]1C[C@H](N)c2c(Cl)cc(Cl)cc2N1, CCCC(=O)Cl to produce CCCC(=O)N[C@H]1C[C@H](C(=O)OC)Nc2cc(Cl)cc(Cl)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.