Used as a key intermediate in the synthesis of angiotensin II receptor antagonists, particularly in the production of antihypertensive drugs like valsartan and related sartan-class medications. The tetrazole ring mimics the carboxylic acid group in biological activity, enhancing binding to the angiotensin II receptor. Its ester functionality allows for easy modification during multi-step drug synthesis. Commonly employed in pharmaceutical research and development for optimizing drug candidates targeting cardiovascular diseases.