Using O=C([O-])[O-], COC(=O)c1cc(NS(C)(=O)=O)cc([N+](=O)[O-])c1 to produce COC(=O)c1cc(N(C)S(C)(=O)=O)cc([N+](=O)[O-])c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.