Used as an intermediate in pharmaceutical synthesis, particularly in the development of bioactive molecules and drug candidates. This compound features a pyrrolidine ring substituted with cyano and methyl groups at the 3-position, and a tert-butyl carbamate (Boc) protecting group on the nitrogen. Its nitrile and pyrrolidine functionalities make it valuable for constructing complex nitrogen-containing compounds. Commonly employed in medicinal chemistry for structure-activity relationship studies, especially in the design of enzyme inhibitors and receptor modulators. The Boc group allows for easy protection of the nitrogen, enabling selective reactions at other sites, such as hydrolysis or reduction of the nitrile, during multi-step syntheses.