Using CCOC(=O)C(C(=O)OCC)c1cccc(Br)c1, OB(O)c1ccc(C(F)(F)F)cc1Cl to produce CCOC(=O)C(C(=O)OCC)c1cccc(-c2ccc(C(F)(F)F)cc2Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.