Using COC1(OC)CC(COS(=O)(=O)C(F)(F)F)(C(=O)OC(C)C)C1, [F-] to produce COC1(OC)CC(CF)(C(=O)OC(C)C)C1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.