E 4021 is a PDE5A inhibitor potentially for the treatment of pulmonary arterial hypertension. References: Yamaguchi K, Oka M, Nishino M, Hanasato N, Kira S, Fukuchi Y. [E 4021, a cGMP phosphodiesterase inhibitor, is a selective pulmonary vasodilator in chronically hypoxic pulmonary hypertensive rats]. Nihon Kokyuki Gakkai Zasshi. 1998 Jan;36(1):23-8. Japanese. PubMed PMID: 9611972.

纯度：≥98%

CAS：150452-18-9