title: Spartioidine and Usaramine, Two Pyrrolizidine Alkaloids from Senecio vulgaris.
authors.affiliation: Department of Pharmaceutical Sciences, University of Antwerp (U.I.A.), Universiteitsplein 1, B-2610 Antwerp, Belgium.
authors.forename: L A
authors.initials: LA
authors.lastname: Pieters
authors.forename: A J
authors.initials: AJ
authors.lastname: Vlietinck