%0 Journal Article %A C Lin %A Y Li %A J McGlotten %A J B Morton %A S Symchowicz %T Isolation and identification of the major metabolite of albuterol in human urine. %D 1977 %J Drug Metabolism and Disposition %P 234-238 %V 5 %N 3 %X The major urinary metabolite of albuterol in man was isolated and purified by ion-exchange chromatography and countercurrent distribution. On the basis of proton magnetic resonance, infrared, and mass-spectral analysis, enzymic hydrolysis, and assay of inorganic sulfate after acid hydrolysis, the metabolite has been identified as the 4'-O-sulfate ester of albuterol. %U https://dmd.aspetjournals.org/content/dmd/5/3/234.full.pdf