[Methylation of methadone on nitrogen to a quaternary ammonium base].
D000468:Alkalies; D064751:Ammonium Compounds; D008691:Methadone / Q000737:chemistry*; D008745:Methylation; D009584:Nitrogen
D000468:Alkalies; D064751:Ammonium Compounds; D009584:Nitrogen; D008691:Methadone
METHADONE/chemistry