Using CCOC(=O)CCCOc1cc(C(F)(F)F)cc(C(F)(F)F)c1 to produce O=C(O)CCCOc1cc(C(F)(F)F)cc(C(F)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.