title: [Gas chromatographic analysis of the metabolites in the tryptophan-niacin cycle (author's transl)].
mesh_terms: D002849:Chromatography, Gas / Q000379:methods*; D006801:Humans; D007736:Kynurenic Acid / Q000652:urine; D009539:Nicotinic Acids / Q000652:urine*; D014364:Tryptophan / Q000378:metabolism*; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis; D062367:ortho-Aminobenzoates / Q000652:urine
chemical_list: D009539:Nicotinic Acids; D062367:ortho-Aminobenzoates; D014364:Tryptophan; D007736:Kynurenic Acid