Using O=C(Cl)CCc1ccccc1, Nc1nc(Cc2ccccc2)c(C(=O)NCc2ccccc2)s1 to produce O=C(CCc1ccccc1)Nc1nc(Cc2ccccc2)c(C(=O)NCc2ccccc2)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.