Using CCOC(=O)C(F)(F)F, Fc1cc(Br)cc(C(F)(F)F)c1 to produce O=C(c1cc(F)cc(C(F)(F)F)c1)C(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.