title: 6-O-Isobutyryl-tetrahydrohelenalin from the flowers of Arnica montana.
abstract: From the flowers of ARNICA MONTANA L., the helenanolides 6- O-isobutyryl-tetrahydrohelenalin and 2beta-ethoxy-6- O-isobutyryl-2,3-dihydrohelenalin were isolated and their structures established by spectroscopic methods.
authors.affiliation: Institut für Pharmazeutische Biologie der Universität Düsseldorf, Geb. 26.23, Universitätsstr. 1, D-4000 Düsseldorf 1.
authors.forename: G
authors.initials: G
authors.lastname: Willuhn
authors.forename: P M
authors.initials: PM
authors.lastname: Röttger
authors.forename: D
authors.initials: D
authors.lastname: Wendisch