Using COC(=O)c1ccc(F)c2c1C(O)C(C)(C)C(c1cccc(Br)c1)N2 to produce COC(=O)c1ccc(F)c2c1CC(C)(C)C(c1cccc(Br)c1)N2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.