Using [NH4+], Cc1ncc2c(C#N)nn(Cc3cccc(F)c3F)c2n1 to produce Cc1ncc2c(C(=N)N)nn(Cc3cccc(F)c3F)c2n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.