Using Cn1nc(-c2c(F)cc3c(c2NC(=O)C(C)(C)Br)NC(=O)CO3)c(Cl)c1C(F)(F)F to produce Cn1nc(-c2c(F)cc3c4c2NC(=O)C(C)(C)N4C(=O)CO3)c(Cl)c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.