Recent studies have shown that nitroxyl (HNO)(1HNO/3NO−), which is the one-electron- reduced form of nitric oxide (NO), has unique biological activities, especially in the cardiovascular system, and HNO-releasing agents may have therapeutic potential. Since few HNO donors are available for use under physiological conditions, we synthesized and evaluated a series of Piloty's acid (PA) derivatives and evaluated their HNO-releasing ...