Using OB(O)c1cccnc1, Nc1c([N+](=O)[O-])cc(Br)cc1[N+](=O)[O-] to produce Nc1c([N+](=O)[O-])cc(-c2cccnc2)cc1[N+](=O)[O-], please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.