Studies on the metabolic fate and the pharmacokinetics of 5-n-butyl-1-cyclohexyl-2,4,6-trioxoperhydropyrimidine (BCP) in man. II. Determination of BCP and its metabolite, 1-cyclohexyl-5-(3-hydroxybutyl)-2,4,6-trioxoperhydropyrimidine by ultraviolet absorption method |