Used as a key building block in pharmaceutical synthesis, particularly in the development of biologically active compounds. Its strained oxetane ring enhances metabolic stability and improves pharmacokinetic properties in drug candidates. Commonly employed in the preparation of protease inhibitors and other therapeutic agents where polarity and binding affinity are critical. Also utilized in agrochemicals to enhance compound stability and efficacy. The carboxylic acid group allows for easy derivatization, enabling incorporation into larger molecules through amide or ester formation.