Using O=C1C(c2ccccc2)=C(c2ccccc2)C(=O)N1c1ccc(Cl)cc1 to produce O=C1C(c2ccccc2)=C(c2ccccc2)C(O)N1c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.