d-Butorphanol tartrate

Morphinan-3,14-diol, 17-(cyclobutylmethyl)-, (9α,13α,14α)-, (2R,3R)-2,3-dihydroxybutanedioate (1:1) (salt)

Morphinan-3,14-diol, 17-(cyclobutylmethyl)-, (9α,13α,14α)-, [R-(R*,R*)]-2,3-dihydroxybutanedioate (1:1) (salt)