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