Using O=S(=O)(OCC(F)(F)F)C(F)(F)F, CCc1nc2c(Cl)c(Br)ccc2[nH]1 to produce CCc1nc2c(Cl)c(Br)ccc2n1CC(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.