Using CCCC(=O)C(F)(F)CCC[C@@H]1[C@H]2CC(=O)O[C@H]2C[C@H]1OC1CCCCO1 to produce CCCC(O)C(F)(F)CCC[C@@H]1[C@H]2CC(=O)O[C@H]2C[C@H]1OC1CCCCO1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.