Using CCCc1c(C(=O)C(C)C)c2ccc(C#N)cc2n1Cc1ccccc1Cl to produce CCCc1c(C(O)C(C)C)c2ccc(C#N)cc2n1Cc1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.