Using Cc1ccc(C(O)c2ccc3noc(-c4cccc(Cl)c4)c3c2)cc1 to produce Cc1ccc(C(=O)c2ccc3noc(-c4cccc(Cl)c4)c3c2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.