Using O=C(O)c1ccc(-c2nc3ccc(O)cc3[n+]([O-])n2)cc1 to produce O=C(O)c1ccc(-c2nnc3cc(O)ccc3n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.