17-(Cyclobutylmethyl)-4,5alpha-epoxymorphinan-3,6alpha,14-triol 20594-83-6 23277-43-2 EINECS 243-901-6 Morphinan-3,6,14-triol, 17-(cyclobutylmethyl)-4,5-epoxy-, (5alpha,6alpha)- N-Cyclobutylmethyl-4,5alpha-epoxy-3,6alpha,14-morphinantriol Nalbufina [DCIT] Nalbuphine Nalbuphinum [INN-Latin]