Using OB(O)c1ccc(C(F)(F)F)cc1, COC(=O)c1cnc(Br)n1C to produce COC(=O)c1cnc(-c2ccc(C(F)(F)F)cc2)n1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.