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. Its bifunctional structure, featuring both aldehyde and carboxylic acid groups, allows for selective chemical modifications and coupling reactions, making it valuable in pharmaceutical development. Commonly employed in condensation and cyclization reactions to build the core heterocyclic structures found in active pharmaceutical ingredients. Also utilized in research settings for designing novel bioactive molecules and functionalized biphenyl derivatives.