New Alkaloids from Aconitum stapfianum

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Medicinal Chemistry

Background:

• Aconitum species are known sources of bioactive alkaloids.
• Aconitum stapfianum's chemical constituents remain underexplored.
• Alkaloids possess diverse pharmacological properties.

Purpose of the Study:

• To isolate and characterize alkaloids from Aconitum stapfianum roots.
• To identify novel alkaloid structures from this plant source.
• To contribute to the understanding of Aconitum's phytochemical diversity.

Main Methods:

• Extraction of alkaloids from Aconitum stapfianum root material.
• Purification of isolated compounds using chromatographic techniques.
• Structure elucidation via comprehensive spectroscopic analyses, including IR, HRESIMS, 1D NMR, and 2D NMR.

Main Results:

• Isolation of nineteen alkaloids from the plant roots.
• Identification of a new C19-diterpenoid alkaloid, stapfianine A (1).
• Characterization of a new benzamide derivative, stapfianine B (2).

Conclusions:

• The study successfully identified nineteen alkaloids from Aconitum stapfianum roots.
• Two novel alkaloids, stapfianine A and stapfianine B, were discovered and structurally elucidated.
• This research expands the known chemical profile of Aconitum stapfianum and its alkaloid constituents.