Using Nc1ccc(OC(F)(F)F)cc1, O=C(O)c1ccnc(Br)c1 to produce O=C(Nc1ccc(OC(F)(F)F)cc1)c1ccnc(Br)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.