A new metabolite of methamphetamine; evidence for formation of N-[(1-methyl-2-phenyl)ethyl]ethanimine N-oxide.
1987
1. N-Hydroxyamphetamine and N-hydroxymetharnphetamine, metabolic intermediates of amphetamine and methamphetamine, showed no reactivity towards endogeneous protein, amino acids, nucleic acids and fatty acids. In contrast, formaldehyde, acetaldehyde and propionaldehyde reacted well with N-hydroxyamphetamine and slightly with N-hydroxymethamphetamine under mild conditions (pH 7.4, 37°C).2. Two products were isolated from the reaction mixture of acetaldehyde and N-hydroxyamphetamine. These were characterized as N-[(1-methyl-2-phenyl)ethyl]ethani-mine N-oxide and N-[(1-methyl-2-phenyl)ethyl]butenimine N-oxide by mass and n.m.r. spectrometries.3. N-[(1-Methyl-2-phenyl)ethyl]ethanimine N-oxide was formed by incubating methamphetamine with liver 9000 g supernatants of rats and guinea-pigs. The butenimine N-oxide derivative, however, could not be detected as a metabolite of methamphetamine in vitro.4. N-[(1-Methyl-2-phenyl)ethyl]ethanimine N-oxide was also detected as a urinary metabolite of methamphetamine in ra...
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