Using CC(=O)c1cccc(C(C)(C)NC(=O)Nc2ccc(Cl)cc2)c1 to produce CC(O)c1cccc(C(C)(C)NC(=O)Nc2ccc(Cl)cc2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.