Using Nc1nc(Cl)c2ccn(CCBr)c2n1, Fc1ccc(N2CCNCC2)c(F)c1 to produce Nc1nc(Cl)c2ccn(CCN3CCN(c4ccc(F)cc4F)CC3)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.