Using Oc1cccc(O)c1, O=C1C(Cl)=C(Cl)C(=O)c2ccccc21 to produce O=C1c2ccccc2C(=O)c2c1oc1cc(O)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.