Using FC(F)(F)c1cccc(CBr)c1, CCOC(=O)C(C)C(=O)OCC to produce CCOC(=O)C(C)(Cc1cccc(C(F)(F)F)c1)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.