Using O=C1CCOc2cc(Br)ccc21, OB(O)c1ccc(C(F)(F)F)cc1 to produce O=C1CCOc2cc(-c3ccc(C(F)(F)F)cc3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.