6-O-Isobutyryl-tetrahydrohelenalin from the flowers of Arnica montana.
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.
Willuhn
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Institut für Pharmazeutische Biologie der Universität Düsseldorf, Geb. 26.23, Universitätsstr. 1, D-4000 Düsseldorf 1.
Röttger
P M
PM
Wendisch
D
D