Using O=C(NCc1ccc(Br)cc1F)c1cc([N+](=O)[O-])ccc1O, CC(C)(C)OC(=O)CBr to produce CC(C)(C)OC(=O)COc1ccc([N+](=O)[O-])cc1C(=O)NCc1ccc(Br)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.