Using O=C1CCC(=O)N1Br, Cc1ccc(C#N)c(N=C(c2ccccc2)c2ccccc2)c1 to produce N#Cc1ccc(CBr)cc1N=C(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.