Benazeprilat (CGS 14831) is a synthetic organic compound and the active metabolite of benazepril, an ACE inhibitor. In pharmaceutical research and development, it is used as a reference standard for analytical purposes, such as HPLC assays and pharmacokinetic studies to quantify benazepril metabolism in biological samples. Therapeutically, as the active form of benazepril, it inhibits angiotensin-converting enzyme (ACE), leading to vasodilation, reduced blood pressure, and decreased cardiac workload. This makes it effective in managing hypertension, congestive heart failure, and slowing the progression of diabetic nephropathy by lowering levels of angiotensin II and aldosterone.