Using Cc1cnc(Sc2ccc([N+](=O)[O-])cc2)c(C#N)c1, O=C1CCC(=O)N1Br to produce N#Cc1cc(CBr)cnc1Sc1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.