Using O=S(=O)(OCC(F)(F)C(F)(F)F)C(F)(F)F, Oc1ccc(Br)c(F)c1 to produce Fc1cc(OCC(F)(F)C(F)(F)F)ccc1Br, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.