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(1R,3S)-Benazepril Hydrochloride is an isomer of Benazepril (B119750), an angiotensin converting enzyme inhibitor and a antihypertensive agent.

Benazepril hydrochloride,(3S)-3-[[(1S)-1-carbethoxy-3-phenylpropyl]amino]-2,3,4,5-tetrahydro-2-oxo-1H-1-benzazepine-1-acetic acid 3-ethylester hydrochloride (Lotensin), is metabolized rapidly to theactive diacid benazaprilat. As with the ACE prodrugs, nomutagenicity has been found, even though these drugs crossthe placenta.