Using Nc1nc2c(s1)CCNCC2, FC(F)(F)c1cccc(C=CCBr)c1 to produce Nc1nc2c(s1)CCN(CC=Cc1cccc(C(F)(F)F)c1)CC2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.