Quinaprilat-d5 is a deuterium-labeled Quinaprilat. Quinaprilat is a nonsulfhydryl ACE inhibitor, the active diacid metabolite of Quinapril. Quinaprilat specifically blocks the conversion of angiotensin I to the vasoconstrictor angiotensin II and inhibits bradykinin degradation. Quinaprilat primarily acts as a vasodilator, decreasing total peripheral and renal vascular resistance[1].
[1]. Kieback AG, et al. Quinaprilat: a review of its pharmacokinetics, pharmacodynamics, toxicological data and clinical application. Expert Opin Drug Metab Toxicol. 2009;5(10):1337-1347.