Using CCCCCCCCC(C(=O)OCC)C(=O)OCC, Fc1cc(Br)ccc1CBr to produce CCCCCCCCC(Cc1ccc(Br)cc1F)(C(=O)OCC)C(=O)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.