Using O=C1CCC(=O)N1Br, CC(C)(C)OC(=O)N[C@@H](CC(=O)N1CCn2c(cnc2C(F)(F)F)C1)Cc1cc(F)c(F)cc1F to produce CC(C)(C)OC(=O)N[C@@H](CC(=O)N1CCn2c(C(F)(F)F)nc(Br)c2C1)Cc1cc(F)c(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.