Using O=C1NCc2cc(Br)ccc21, O=S(=O)(OCC(F)(F)F)C(F)(F)F to produce O=C1c2ccc(Br)cc2CN1CC(F)(F)F, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.