6β-Naltrexol-d3
6β-Naltrexol-d3 (6β-Hydroxynaltrexone-d3) is deuterium labeled 6β-Naltrexol. 6β-Naltrexol (6β-Hydroxynaltrexone), the primary metabolite of Naltrexone, is a peripherally selective opioid antagonist. 6β-Naltrexol selectively inhibits gastrointestinal opioid effects in human subjects and inhibits Morphine-induced slowing of gastrointestinal transit.