Using O=C([O-])[O-], COC(=O)c1ccc(NS(C)(=O)=O)cc1Cl to produce COC(=O)c1ccc(N(C)S(C)(=O)=O)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.