Isolation and Identification of 1-Ribosyl Pyridone Nucleosides from Human Urine

Abstract 1-Ribosylpyridin-4-one-3-carboxamide with lesser amounts of 1-ribosylpyridin-2-one-5-carboxamide have been isolated quantitatively from human urine using ion exchange column chromatography. Absorption spectra and mass spectrometry were used in the identification.