Using CC(C)(O)CNc1c([N+](=O)[O-])c(Cl)nc2cc(Br)ccc12 to produce CC(C)(O)CNc1c(N)c(Cl)nc2cc(Br)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.