Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, CC(=O)Oc1c(C)cc(O)cc1C to produce CC(=O)Oc1c(C)cc(OCC(F)(F)F)cc1C, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.