What is "moxazocine"

n. An opioid analgesic of the benzomorphan family.

Moxazocine (BL-4566) is an opioid analgesic of the benzomorphan family which was never marketed. It acts as a partial agonist or mixed agonist/ antagonist of the opioid receptors and binds preferentially to the κ-opioid receptor. Despite its failure to reach the market, clinical studies demonstrated moxazocine to be approximately 10x as potent by weight as morphine as an analgesic.