Using O=C1CCC(=O)N1Br, Cc1cc(C(F)(F)F)nn1-c1ccc(F)c(C#N)c1 to produce N#Cc1cc(-n2nc(C(F)(F)F)cc2CBr)ccc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.