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  • Title: Biotransformation of ketamine, (Z)-6-hydroxyketamine, and (E)-6-hydroxyketamine by rat, rabbit, and human liver microsomal preparations.
    Author: Woolf TF, Adams JD.
    Journal: Xenobiotica; 1987 Jul; 17(7):839-47. PubMed ID: 3660854.
    Abstract:
    1. (Z)- and (E)-6-Hydroxyketamine have been synthesized and their metabolism by hepatic microsomal preparations studied to elucidate the metabolism of ketamine. 2. Both 6-hydroxyketamines are exclusively converted to 6-hydroxy-norketamines by N-demethylation. The g.l.c. retention properties and mass spectral characteristics of these 6-hydroxy-norketamines were used to confirm the structures of ketamine metabolites. 3. Ketamine is converted to norketamine, 4-, 5- and 6-hydroxynorketamines and possibly 4- and 6-hydroxyketamines in hepatic microsomal preparations from rats, rabbits and man. Norketamine is the major metabolite in all species tested. 4. 6-Hydroxynorketamine is the major hydroxylated metabolite and is found only in the (Z)-form in the species examined. 5. The metabolism of ketamine and the 6-hydroxy-ketamines is greatly increased after phenobarbital pretreatment of rats and rabbits.
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