Using O=C(O)c1cc(O)cc(C(F)(F)F)c1, O=C(CBr)c1ccccc1 to produce O=C(O)c1cc(OCC(=O)c2ccccc2)cc(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.