Using NS(=O)(=O)c1ccc(S(=O)(=O)CCCO)c([N+](=O)[O-])c1 to produce Nc1cc(S(N)(=O)=O)ccc1S(=O)(=O)CCCO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.