Using O=C1CCCc2ccc(Br)cc21, O=C([O-])C(F)(F)C(F)(F)F to produce O=C1CCCc2ccc(C(F)(F)C(F)(F)F)cc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.