Using COC(=O)CBr, NC(COCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)C1c2ccccc2CCc2ccccc21 to produce COC(=O)CNC(COCc1cc(C(F)(F)F)cc(C(F)(F)F)c1)C1c2ccccc2CCc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.