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