Using Nc1ncc(Br)cc1-c1nc2c(F)cccc2o1, CC(C)(C)OC(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N(C(=O)OC(C)(C)C)c1ncc(Br)cc1-c1nc2c(F)cccc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.