Using Cn1c(-c2ccccc2Cl)nnc1C(C)(C)C(O)c1ccccc1 to produce Cn1c(-c2ccccc2Cl)nnc1C(C)(C)C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.