EHNA is a potent and selective dual inhibitor of cyclic nucleotide phosphodiesterase 2 (PDE2)(IC50=4 µM) and adenosine deaminase (ADA). EHNA exerts a concentration inhibition of the cGMP-stimulated PDE II (cGs-PDE)(IC50:0.8 µM (human), 2 µM (porcine myocardium)), but has smaller inhibitory effect on the unstimulated PDE2 activity. EHNA play roles in mediating diverse pharmacological responses, including antiviral, antitumour and antiarrhythmic effects[1][2][3].
