title: Quantitation of levorphanol in plasma using high-performance liquid chromatography with electrochemical detection.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D006801:Humans; D007202:Indicators and Reagents; D007977:Levallorphan / Q000097:blood; D007981:Levorphanol / Q000097:blood*; D009294:Narcotics / Q000097:blood
chemical_list: D007202:Indicators and Reagents; D009294:Narcotics; D007981:Levorphanol; D007977:Levallorphan