Using O=N[O-], NNC(=O)c1cc2c(cn1)[nH]c1ncc(Br)cc12 to produce [N-]=[N+]=NC(=O)c1cc2c(cn1)[nH]c1ncc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.