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