Using NC(N)=O, O=c1c2cc(Br)ccc2oc2c([N+](=O)[O-])ccnc12 to produce O=c1c2cc(Br)ccc2oc2c([N+](=O)[O-])cc[n+]([O-])c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.