Using CCOc1c(C(C)=O)cc(Cl)c(C#N)c1C(O)CNC(=O)OC(C)(C)C to produce CCOc1c(C(C)=O)cc(Cl)c(C#N)c1C1CNC(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.