Using O=S(=O)(O)O, Nc1ccccc1Sc1cc([N+](=O)[O-])ccc1C(=O)O to produce O=C(O)c1ccc([N+](=O)[O-])cc1Sc1ccccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.