title: Alkaloids from Tabernaemontana psorocarpa.
abstract: The isolation of the alkaloids from two different samples of stem bark of Tabernaemontana psorocarpa is described. Both samples contained 16-epi-isositsirikine as the major alkaloid but differed from each other in the number and quantity of the other alkaloids. The following minor alkaloids were identified: 12-methoxy-14,15-dehydro-vincamine, vallesiachotamine, isovallesiachotamine, tetrahydroalstonine, coronaridine and voacangine.
authors.affiliation: Department of Pharmacognosy, Gorlaeus Laboratories, Leiden, The Netherlands.
authors.forename: T A
authors.initials: TA
authors.lastname: van Beek
authors.forename: R
authors.initials: R
authors.lastname: Verpoorte
authors.forename: A
authors.initials: A
authors.lastname: Baerheim Svendsen