Insect Antifeedant Activity of Three New Tetranortriterpenoids from Trichilia pallida

Three new tetranortriterpenoids, methyl 6-hydroxy-11 beta-acetoxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (3), methyl 6,11 beta-dihydroxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (4), and methyl 6-hydroxy-...

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Veröffentlicht in:	Journal of natural products (Washington, D.C.) D.C.), 2001-08, Vol.64 (8), p.1117-1120
Hauptverfasser:	SIMMONDS, Monique S. J., STEVENSON, Philip C., PORTER, Elaine A., VEITCH, Nigel C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animals Biological and medical sciences Biological Assay Chemical control Chromatography, High Pressure Liquid Control Feeding Behavior - drug effects Fundamental and applied biological sciences. Psychology General pharmacology Larva - drug effects Lepidoptera - drug effects Limonins Magnetic Resonance Spectroscopy Medical sciences Molecular Structure Pharmacognosy. Homeopathy. Health food Pharmacology. Drug treatments Phytopathology. Animal pests. Plant and forest protection Plant Roots - chemistry Plants, Medicinal - chemistry Protozoa. Invertebrates Spectrophotometry, Ultraviolet Trichilia pallida Triterpenes - chemistry Triterpenes - isolation & purification United Kingdom
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Zusammenfassung:	Three new tetranortriterpenoids, methyl 6-hydroxy-11 beta-acetoxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (3), methyl 6,11 beta-dihydroxy-12 alpha-(2-methylpropanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (4), and methyl 6-hydroxy-11 beta-acetoxy-12 alpha-(2-methylbutanoyloxy)-3,7-dioxo-14 beta,15 beta-epoxy-1,5-meliacadien-29-oate (5), have been isolated from the roots of Trichilia pallida. The related compounds hirtin (1) and deacetylhirtin (2) were also obtained. Compound 4 had the greatest antifeedant activity of 1-5 when tested against larvae of four species of Lepidoptera.
ISSN:	0163-3864 1520-6025
DOI:	10.1021/np010197o