Using COc1ccc2[nH]ccc2c1, O=C1C=C(Cl)C(=O)C=C1Cl to produce COc1ccc2[nH]cc(C3=C(Cl)C(=O)C=C(Cl)C3=O)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.