Using O=c1[nH]c2cc([N+](=O)[O-])cc(CNC3CCS(=O)(=O)C3)c2[nH]c1=O to produce CNCc1cc([N+](=O)[O-])cc2[nH]c(=O)c(=O)[nH]c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.