Used primarily in scientific research to study opioid receptors and their role in the nervous system. Acts as an antagonist at opioid receptors, helping to block the effects of opioids. Useful in investigating mechanisms of opioid dependence, withdrawal, and tolerance. Also explored for potential use in developing treatments for opioid overdose and addiction due to its ability to modulate receptor activity without activating it. Its unique structure allows for high selectivity, making it a valuable tool in pharmacological studies.