BW A575C is a dual inhibitor against angiotensin converting enzyme (ACE) and beta-adrenoceptor. BW A575C produces a competitive blockade of Isoprenaline (HY-108353)-induced tachycardia in a guinea-pig right atrial. BW A575C also inhibits Angiotensin I (HY-P1032)-induced pressor responses in rats. BW A575C is promising for research of hypertensive diseases[1].