RT Journal Article SR Electronic T1 EPOXIDE METABOLITES OF PROTRIPTYLINE IN RAT URINE JF Drug Metabolism and Disposition JO Drug Metab Dispos FD American Society for Pharmacology and Experimental Therapeutics SP 80 OP 84 VO 3 IS 2 A1 H. B. HUCKER A1 A. J. BALLETTO A1 J. DEMETRIADES A1 B. H. ARISON A1 A. G. ZACCHEI YR 1975 UL http://dmd.aspetjournals.org/content/3/2/80.abstract AB Two epoxide metabolites of 5-(3-methylaminopropyl)-5H-dibenzo[a,d]cycloheptene (protriptyline) were identified in the urine of rats given 14C-labeled drug. They were characterized by mass spectrometry, nuclear magnetic resonance spectrometry, and chemical reactivity as 10,11-dihydro-10,11-epoxy-5-(3-methylaminopropyl)-5H-dibenzo[a,d]cycloheptene (I) and 10,11-dihydro-10,11-epoxy-5(3-aminopropyl)-5H-dibenzo[a,d]cycloheptene (II). Over twice as much I as II was excreted and together the two metabolites accounted for approximately 40% of the urinary radioactivity. Copyright © 1975 by The American Society for Pharmacology and Experimental Therapeutics