The in vivo metabolism of 5-(4-nitrophenyl)-4-(2-phenylethyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione in rats.

The purpose of this study was to investigate the in vivo metabolism of 5-(4-nitrophenyl)-4-(2-phenylethyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione. First its potential metabolites were synthesized and then the structures of the original compound were elucidated by UV, 1H-NMR and elemantary analysis. 40 mg dose was given intraperitoneally to rats. Blood samples were collected at 0, 0.5, 1, 2, 4, 6, 12, 24, 48 and 72 hours after administration of substrate and blood was centrifuged to obtain plasma. The plasma were passed through a Sep-Pak C18 cartridge. The samples were separated using HPLC on a reverse phase system. This study revealed reduction, N-acetylation and N-dealkylation as pathway of 5-(4-nitrophenyl)-4-(2-phenylethyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione metabolism.