Using CCc1cc2c([nH]c1=O)c(C)cc1cc(CBr)oc12, [N-]=[N+]=[N-] to produce CCc1cc2c([nH]c1=O)c(C)cc1cc(CN=[N+]=[N-])oc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.