title: Analysis of drugs and their metabolites by gas chromatography-mass spectrometry-computer systems.
mesh_terms: D002849:Chromatography, Gas / Q000379:methods; D003201:Computers; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D004364:Pharmaceutical Preparations / Q000032:analysis* / Q000378:metabolism; D010672:Phenytoin / Q000032:analysis
chemical_list: D004364:Pharmaceutical Preparations; D010672:Phenytoin