The determination of 4-pyridoxic acid in human urine.
D001826:Body Fluids; D006801:Humans; D007536:Isomerism; D009525:Niacin; D009539:Nicotinic Acids / Q000652:urine*; D011735:Pyridoxic Acid; D025101:Vitamin B 6 / Q000031:analogs & derivatives
D009539:Nicotinic Acids; D009525:Niacin; D011735:Pyridoxic Acid; D025101:Vitamin B 6
NICOTINIC ACID ISOMERS/in urine; VITAMIN B6/related compounds