Using COCCOc1cc(Oc2ccc(S(C)(=O)=O)cc2)cnc1[N+](=O)[O-] to produce COCCOc1cc(Oc2ccc(S(C)(=O)=O)cc2)cnc1N, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.