Using OC(c1ccc(CBr)cc1)(C(F)(F)F)C(F)(F)F, Nc1ccc2ncn(C3CCNCC3)c2c1 to produce Nc1ccc2ncn(C3CCN(Cc4ccc(C(O)(C(F)(F)F)C(F)(F)F)cc4)CC3)c2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.