title: [On the gas-chromatographical determination of the pyrrolizidine alkaloids of some Senecio-species].
abstract: A gas-chromatographical method is described on which seven pyrrolizidine alkaloids (Fuchsisenecionine, Senecionine, Senecivernine, Senkirkine, Retrorsine, O (7)-Angelylheliotridine and Heliotrine) are determinated in a qualitative way and their ratio of concentration in Senecio fuchsii, vernalis, inaequidens and ovirensis, ssp. gaudinii.
authors.affiliation: Pharmazeutisches Institut der Universität, An der Immenburg 4, D-5300 Bonn-Endenich.
authors.forename: H
authors.initials: H
authors.lastname: Wiedenfeld
authors.forename: U
authors.initials: U
authors.lastname: Pastewka
authors.forename: P
authors.initials: P
authors.lastname: Stengl
authors.forename: E
authors.initials: E
authors.lastname: Röder