Using Cn1cnc(S(=O)(=O)NCc2ccc3c(c2)C(Cc2ccccc2)C(N)CC3)c1, O=C(Cl)CCCCl to produce Cn1cnc(S(=O)(=O)NCc2ccc3c(c2)C(Cc2ccccc2)C(N2CCCC2=O)CC3)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.