Using CI, Cc1c(Br)c(C(=O)NCC(C)(C)C)n(Cc2ccccc2)c1C(F)(F)F to produce Cc1c(Br)c(C(=O)N(C)CC(C)(C)C)n(Cc2ccccc2)c1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.