Using CCCC(O)=CC(=O)c1cccc(C(F)(F)F)c1, O=C([O-])[O-] to produce CCCC(=O)C(C)C(=O)c1cccc(C(F)(F)F)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.