title: Urinary metabolites of dl-methadone in maintenance subjects.
mesh_terms: D000284:Administration, Oral; D000328:Adult; D001711:Biotransformation; D002247:Carbon Isotopes; D002849:Chromatography, Gas; D003640:Dealkylation; D006801:Humans; D006900:Hydroxylation; D008297:Male; D013058:Mass Spectrometry; D008691:Methadone / Q000008:administration & dosage / Q000627:therapeutic use / Q000652:urine*; D010084:Oxidation-Reduction; D011759:Pyrrolidines / Q000652:urine; D019966:Substance-Related Disorders / Q000188:drug therapy* / Q000652:urine; D014631:Valerates / Q000652:urine
chemical_list: D002247:Carbon Isotopes; D011759:Pyrrolidines; D014631:Valerates; D008691:Methadone