title: Iridoids from Verbascum species.
abstract: The occurrence of iridoids from 16 VERBASCUM species was investigated. The negative ion mass spectroscopy of the acetylated compounds was very useful concerning the appearance of a molecular ion. The fragmentation behaviour of the iridoids under positive and negative ionization is compared and discussed.
authors.affiliation: Institut für Biochemie der Pflanzen der Akademie der Wissenschaften der DDR, DDR-4020 Halle/Saale, Weinberg 3.
authors.forename: K
authors.initials: K
authors.lastname: Seifert
authors.forename: J
authors.initials: J
authors.lastname: Schmidt
authors.forename: N T
authors.initials: NT
authors.lastname: Lien
authors.forename: S
authors.initials: S
authors.lastname: Johne