Isolierung von (−)‐Dunnion aus <i>Calceolaria integrifolia</i> M<scp>URR</scp>. <i>(Scrophulariaceae)</i>

Abstract

Isolation of (−)‐dunnione from the leaves of Calceolaria integrifolia , M URR . (fam. Scrophulariaceae ) From the leaves of Calceolaria integrifolia , a plant often used in horticulture. partially racemic (−)‐dunnione (1) has been isolated. This seems to be the first record of its occurrence outside the family Gesneriaceae , where it previously has been found in two species as the (+)‐enantiomer.