Similarity of SABRE field dependence in chemically different substrates

► Several pyrazole derivatives were examined using the SABRE hyperpolarization method. ► The field dependence of the enhancement depends only slightly on the employed substrates. ► Enhancement of molecules can be increased by reducing the number of protons involved. ► Bulky substrates pose a limitation to this enhancement method. ► A rigorous theoretical understanding of the field dependent SABRE-profile is still in need.