EHNA hydrochloride play roles in mediating diverse pharmacological responses, including antiviral, antitumour and antiarrhythmic effects. EHNA hydrochloride is a potent and selective dual inhibitor of cyclic nucleotide phosphodiesterase 2 (PDE2)(IC50=4 μM) and adenosine deaminase (ADA). EHNA hydrochloride 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.
ADA-07 is a TOPK inhibitor which interacts with TOPK at the ATP-binding pocket and inhibits its kinase activity, thereby suppressing SUV-induced phosphorylation of ERK1 2, p38, and JNKs, and subsequently inhibiting AP-1 activity.