title: Detection of benzoyl ecgonine (cocaine metabolite) in urine by gas chromatography.
mesh_terms: D002849:Chromatography, Gas; D002852:Chromatography, Ion Exchange; D002855:Chromatography, Thin Layer; D003042:Cocaine / Q000378:metabolism / Q000652:urine*; D006801:Humans; D007118:Immunoassay; D008722:Methods; D008745:Methylation; D014326:Tropanes / Q000652:urine*
chemical_list: D014326:Tropanes; D003042:Cocaine