The molecule is an organic heteropentacyclic compound. It has a role as a mu-opioid receptor antagonist and an opioid analgesic. It derives from a hydride of a morphinan.
(4R,4aS,7S,7aR,12bS)-3-(cyclobutylmethyl)-1,2,4,5,6,7,7a,13-octahydro-4,12-methanobenzofuro[3,2-e]isoquinoline-4a,7,9-triol