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Deserpidine hydrochloride is the salf form of Deserpidine (free base), which is an antihypertensive drug related to reserpine which occurs naturally in Rauwolfia canescens. Deserpidine is a competitive inhibitor of the angiotensin converting enzyme (ACE). By competing with angiotensin I for ACE, deserpidine blocks the conversion of angiotensin I to angiotensin II, which is a potent vasoconstrictor. Reduced level of serum angiotensin II causes a decrease in blood pressure. Deserpidine also decreases angiotensin II-induced aldosterone secretion by the adrenal cortex.

Deserpidine (Harmonyl) 是从 Rauwolfia canescens 的根中分离的生物碱。Deserpidine 与 Reserpine 相关。Deserpidine 是竞争性血管紧张素转化酶抑制剂，可以被用作抗高血压药以及镇定剂。Deserpidine 还减少了肾上腺皮质血管紧张素 II 诱导的醛固酮分泌。