Using O=C(O)c1cc(Br)ccc1OCC(F)(F)F, OCC(F)(F)F to produce O=C(O)c1cc(OCC(F)(F)F)ccc1OCC(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.