Using COC(=O)c1ccc2cc(-c3ccc(F)cc3)c(N3CCCc4cc(Br)ccc43)cc2c1 to produce O=C(O)c1ccc2cc(-c3ccc(F)cc3)c(N3CCCc4cc(Br)ccc43)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.