Using O=C([O-])O, Cc1cc(-c2cc(N)cc([N+](=O)[O-])c2)ccn1 to produce Cc1cc(-c2cc(O)cc([N+](=O)[O-])c2)ccn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.