Using Cc1ccc(Br)c(Oc2cc(Cl)cc(C#N)c2)c1F, O=C1CCC(=O)N1Br to produce N#Cc1cc(Cl)cc(Oc2c(Br)ccc(CBr)c2F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.