Species differences in thein vitrometabolism of phencyclidine

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Abstract
1. The metabolism of 1-(1-phenylcyclohexyl)-piperidine (phencyclidine or PCP) by liver preparations from cat, monkey, rabbit and rat has been studied. 2. 4-Phenyl-4-piperidinocyclohexanol (I), 1-1-phenylcyclohexyl-4-hydroxy-piperidine (II), N-(5-hydroxypentyl)-1-phenylcyclohexylamine (IX) and 5-(l-phenylcyclohexylamino)-valeric acid (X) were found in all species, but liver preparations of rat and rabbit were much more active than those of cat or monkey in metabolizing PCP. 3. Only rabbit produced 4-(4′-hydroxypiperidino)-4-phenylcyclohexanol (III) in amounts detectable by g.l.c. 4. Mass balance calculations of PCP, I, II, III, IX and X in the cat, monkey and rat indicate that other metabolic pathways not measured in this study are operative.