Two Novel Diterpenoid Alkaloids from Aconitum Pendulum.

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Insect Toxicology

Background:

• Aconitum pendulum is a plant source of bioactive compounds.
• Diterpenoid alkaloids are known for diverse biological activities.
• Natural pesticides are crucial for sustainable agriculture and pest management.

Purpose of the Study:

• To isolate and characterize novel and known compounds from Aconitum pendulum.
• To evaluate the anti-insecticidal properties of these compounds against two-spotted spider mites.
• To explore the potential of diterpenoid alkaloids as natural pesticides.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation using spectroscopic methods (NMR, MS, IR) and X-ray diffraction.
• Contact toxicity bioassays against two-spotted spider mites.

Main Results:

• Two new diterpenoid alkaloids (aconitine-type and napelline-type) and ten known compounds were identified.
• Compounds 1, 2, and 9 exhibited moderate contact toxicity against spider mites.
• LC50 values for compounds 1, 2, and 9 were determined as 0.86±0.09, 0.95±0.23, and 0.89±0.19 mg/mL, respectively.

Conclusions:

• Aconitum pendulum yielded novel diterpenoid alkaloids with insecticidal potential.
• Diterpenoid alkaloids demonstrate promise as natural, plant-derived pesticides.
• Further research could lead to eco-friendly pest management solutions.