Using O=C(CBr)c1ccccc1OC(F)(F)F, COC(=O)CC(C)=O to produce COC(=O)C(CC(=O)c1ccccc1OC(F)(F)F)C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.