Using CCOC(=O)C(C#N)C1(c2cccc(Cl)c2)CCN(C(=O)OC(C)(C)C)CC1 to produce CC(C)(C)OC(=O)N1CCC(c2cccc(Cl)c2)(C(C#N)C(=O)O)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.