4,5alpha-Epoxy-3,14-dihydroxy-17-methyl-6-oxo-17-(2-propenyl)morphinanium 73232-50-5 85765-51-1 Methylnaloxone Methylnaloxonium Morphinanium, 4,5-epoxy-3,14-dihydroxy-17-methyl-6-oxo-17-(2-propenyl)-, (5alpha)- N-Methylnaloxone Org 10908