Used as a chiral intermediate in the synthesis of pharmaceutical agents, particularly in the development of protease inhibitors. Its sulfonamide and carboxylic acid functionalities allow for strong binding interactions with biological targets, making it valuable in drug design for metabolic and inflammatory diseases. The (S)-configuration at the pyrrolidine center enhances stereoselectivity, improving efficacy and reducing off-target effects in active compounds. Commonly employed in medicinal chemistry for structure-activity relationship (SAR) studies due to its rigid aromatic backbone and defined stereochemistry.