Using COc1ccc2[nH]ccc2c1, O=C(Cl)c1cccc2ccccc12 to produce COc1ccc2[nH]cc(C(=O)c3cccc4ccccc34)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.