Insect antifeedant compounds from Nothofagus dombeyi and N. pumilio.
A bioassay-guided purification of the extracts of Nothofagus dombeyi and N. pumilio leaves yielded several triterpenes and flavonoids including 2-O-acetylmaslinic acid, 3-O-acetyl 20,24,25-trihydroxydammarane, and 3,20,24,25-tetrahydroxydammarane as new natural products. All the isolated compounds were assessed for antifeeding activity against the 5th instar larvae of Ctenopsteustis obliquana. 12-Hydroxyoleanolic lactone and pectolinarigenin from N. dombeyi and dihydrooroxylin A from N. pumilio, showed significant antifeeding activity.
Thoison
Odile
O
Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, Bat. 27, F-91198, Gif-Sur-Yvette, France.
Sévenet
Thierry
T
Niemeyer
Hermann M
HM
Russell
Graeme B
GB
D000818:Animals; D002850:Chromatography, Gel; D029962:Fagaceae / Q000737:chemistry*; D005247:Feeding Behavior; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D007313:Insecta / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009904:Optical Rotation; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
D005419:Flavonoids; D010936:Plant Extracts; D014315:Triterpenes