In vitro metabolism of procyclidine in the rat.

Procyclidine, 1-cyclohexyl-1-phenyl-3-(1-pyrrolidinyl)-1-propanol, was incubated with the 9000g supernatant fraction of rat liver homogenates, fortified with a NADPH generating system. Three major metabolites were isolated from the incubation mixture. They were identified as 1-(cis-4-hydroxycyclohexyl)-1-phenyl-3-(1-pyrrolidinyl)-1-propanol, 1-(trans-4-hydroxycyclohexyl)-1-phenyl-3-(1-pyrrolidinyl)-1-propanol, and (1R*, 3R*, 7S(R?)*)-1-(trans-3-hydroxycyclohexyl)-1-phenyl-3-(1-pyrrolidinyl) -1-propanol. The latter has not been detected previously in rat urine and probably represents an intermediate metabolite.