S3337 is used primarily in biochemical research as a selective inhibitor of caspase enzymes, aiding in the study of apoptosis mechanisms and cellular signaling pathways. It is employed in laboratory settings to investigate enzyme activity in processes such as cancer development and neurological diseases, and to explore potential therapeutic targets. Its applications extend to drug development for anti-cancer therapies and apoptosis regulation, contributing to advancements in pharmacology and medicine. Additionally, it is utilized in cell culture studies to understand enzyme roles in disease progression, providing insights for treatment strategies.