Five new insecticidal sesquiterpenoids from Celastrus angulatus

Area of Science:

• Natural Products Chemistry
• Organic Chemistry
• Insect Toxicology

Background:

• Celastrus angulatus is a plant species known for its potential medicinal properties.
• Sesquiterpene polyol esters are a class of natural products with diverse biological activities.
• Investigating plant-derived compounds for pest control is crucial for sustainable agriculture.

Purpose of the Study:

• To isolate and characterize new sesquiterpene polyol esters from Celastrus angulatus root bark.
• To evaluate the insecticidal potential of these isolated compounds against Mythimna separata.

Main Methods:

• Bioassay-guided fractionation was employed to isolate active compounds.
• Structural elucidation was performed using comprehensive spectral data interpretation (e.g., NMR, MS).
• Insecticidal activity was assessed against Mythimna separata larvae.

Main Results:

• Five new sesquiterpene polyol esters, designated compounds 1-5, were successfully isolated and structurally identified.
• The structures of compounds 1-5 were confirmed through detailed spectral analysis.
• Compounds 1-5 exhibited notable insecticidal activity against Mythimna separata larvae.

Conclusions:

• The root bark of Celastrus angulatus is a source of novel sesquiterpene polyol esters.
• These newly identified compounds possess insecticidal properties, suggesting potential applications in pest management.
• Further research into the mechanism of action and optimization of these compounds is warranted.