title: Study of the stability of cocaine and benzoylecgonine, its major metabolite, in blood samples.
mesh_terms: D002140:California; D003042:Cocaine / Q000031:analogs & derivatives* / Q000097:blood*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D006801:Humans; D014116:Toxicology / Q000639:trends
chemical_list: C005618:benzoylecgonine; D003042:Cocaine