Using Cn1c(-c2cnc(N)s2)cc2ccccc21, O=C(Cl)c1ccccc1Cl to produce Cn1c(-c2cnc(NC(=O)c3ccccc3Cl)s2)cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.