Using COc1c(C(C)=O)cc(Cl)c(Cl)c1C1CN(C(=O)OC(C)(C)C)C1 to produce COc1c(C(C)O)cc(Cl)c(Cl)c1C1CN(C(=O)OC(C)(C)C)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.