ZSY-27

ZSY-27 is a **synthetic small molecule** with cardiotonic and vasodilatory actions, classified chemically as a thiazinone derivative[1][5]. It acts as a **positive inotropic agent** (increases the force of heart muscle contraction) that does not belong to catecholamine or glycoside classes[1][5]. Its pharmacological activity is primarily attributed to **non-specific relaxation of vascular smooth muscle**, mediated largely by inhibition of phosphodiesterase enzymes, leading to increased intracellular cyclic AMP (cAMP) concentrations[1][3]. This results in vasodilation and enhanced cardiac contractility. Studies demonstrate that ZSY-27 antagonizes contractile responses induced by phenylephrine, prostaglandin F2 alpha, and potassium in isolated rabbit thoracic aorta, and potentiation by forskolin (adenylate cyclase stimulator) further implicates the cAMP pathway[1][3][5]. ZSY-27 also stimulates pancreatic exocrine secretion in dogs by raising intracellular cAMP[3]. The compound was investigated primarily by academic groups, with a focus on underlying molecular processes affecting smooth muscle contractility and cardiac function[1][5].

Other names

5-methyl-6-(4-pyridyl)-2H-1,4-thiazin-3(4H)-one