title: 3-O-methylated catecholamines in human urine: improved gas chromatorgraphic assay.
mesh_terms: D002395:Catecholamines / Q000652:urine*; D002849:Chromatography, Gas / Q000379:methods; D004298:Dopamine / Q000031:analogs & derivatives / Q000032:analysis; D006801:Humans; D013578:Synephrine / Q000032:analysis
chemical_list: D002395:Catecholamines; D013578:Synephrine; D004298:Dopamine