Using O=C([O-])[O-], O=C(O)c1cc(S(=O)O)ccc1OC(F)(F)F to produce CS(=O)(=O)c1ccc(OC(F)(F)F)c(C(=O)O)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.