title: Synthesis and mass spectra of deuterium-labelled ketobemidone and of some potential ketobemidone metabolites.
mesh_terms: D000701:Analgesics, Opioid / Q000378:metabolism*; D003903:Deuterium; D007553:Isotope Labeling; D013058:Mass Spectrometry; D008614:Meperidine / Q000031:analogs & derivatives* / Q000378:metabolism
chemical_list: D000701:Analgesics, Opioid; D008614:Meperidine; D003903:Deuterium; C012394:ketobemidone