Using O=C(Nc1ccc2c(c1)CCC2)c1ccccc1Cl, O=C(Cl)c1ccccc1Cl to produce O=C(Nc1cc2c(cc1C(=O)c1ccccc1Cl)CCC2)c1ccccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.