title: Constituents of West African medicinal plants.
abstract: Extracts of the stems and roots of Heptacyclum zenkeri Engl. (Menispermaceae) (syn. Penianthus Zenkeri Diels) collected in Ghana afforded the protoberberine alkaloids palmatine and jatrorrhizine and the aporphine alkaloid magnoflorine.
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, U.S.A.
authors.forename: F K
authors.initials: FK
authors.lastname: Duah
authors.forename: P D
authors.initials: PD
authors.lastname: Owusu
authors.forename: J E
authors.initials: JE
authors.lastname: Knapp
authors.forename: D J
authors.initials: DJ
authors.lastname: Slatkin
authors.forename: P L
authors.initials: PL
authors.lastname: Schiff