Using CC(=O)OC(C(=O)OC(C)(C)C)c1cccc(Br)c1, OB(O)c1ccc(OC(F)(F)F)cc1 to produce CC(=O)OC(C(=O)OC(C)(C)C)c1cccc(-c2ccc(OC(F)(F)F)cc2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.