title: Metabolism of N-nitrosomorpholine by the rat in vivo and by rat liver microsomes and its oxidation by the Fenton system.
abstract: N-Nitrosomorpholine is converted into N-nitroso-2-hydroxymorpholine by rat liver microsomes and by the Fenton oxidation system. The hydroxy derivative was also synthesised by the oxidation of N-nitrosodiethanolamine with permanganate and characterized as the methoxime and the 2,4-dinitrophenylhydrazone. The Fenton system also afforded products believed to be N-nitroso-2-morpholone, and the 2-hydroperoxy- and 2-peroxy-derivatives of N-nitrosomorpholine. The only urinary metabolite definitely identified was N-nitrosodiethanolamine. The significance of metabolic 2-hydroxylation in relation to the carcinogenic action of N-nitrosomorpholine is discussed.
mesh_terms: D000818:Animals; D002273:Carcinogens / Q000378:metabolism*; D055598:Chemical Phenomena; D002621:Chemistry; D006900:Hydroxylation; D066298:In Vitro Techniques; D008862:Microsomes, Liver / Q000378:metabolism*; D009025:Morpholines / Q000378:metabolism; D009602:Nitrosamines / Q000378:metabolism*; D010084:Oxidation-Reduction; D051381:Rats
chemical_list: D002273:Carcinogens; D009025:Morpholines; D009602:Nitrosamines; C002741:N-nitrosomorpholine