Using O=C([O-])[O-], CC(C)(C)OC(=O)Nc1cc(F)c(F)cc1Br to produce CN(C(=O)OC(C)(C)C)c1cc(F)c(F)cc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.