RT Journal Article SR Electronic T1 N-HYDROXYAMOBARBITAL: THE SECOND MAJOR METABOLITE OF AMOBARBITAL IN MAN JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 479 OP 486 VO 3 IS 6 A1 B. K. TANG A1 T. INABA A1 W. KALOW YR 1975 UL http://dmd.aspetjournals.org/content/3/6/479.abstract AB After oral administration of 14C-labeled amobarbital to healthy subjects, most of the radioactivity was recovered in urine and only 4-5% in feces over a period of 6 days. No unchanged amobarbital was excreted. Two major metabolites were found and isolated. One was 3'-hydroxyamobarbital, which has been previously identified by Maynert. The second could be identified as N-hydroxyamobarbital on the basis of its spectral and chemical properties. Copyright © 1975 by The American Society for Pharmacology and Experimental Therapeutics