Using Nc1ncc(Cl)s1, COC(=O)c1ccc(S(=O)(=O)Cl)cc1Cl to produce COC(=O)c1ccc(S(=O)(=O)Nc2ncc(Cl)s2)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.