Using O=C(O)CC(=O)O, O=Cc1ccc(S(F)(F)(F)(F)F)cc1 to produce O=C(O)C=Cc1ccc(S(F)(F)(F)(F)F)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.