Using C[C@H](Oc1cccnc1N)c1c(Cl)ccc(F)c1Cl, O=C1CCC(=O)N1Br to produce C[C@H](Oc1cc(Br)cnc1N)c1c(Cl)ccc(F)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.