Using C[O-], CC(C)(Cl)C(=O)c1ccc(C(=O)c2ccccc2)cc1 to produce COC(C)(C)C(=O)c1ccc(C(=O)c2ccccc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.