Two novel sesquiterpenoids from Ainsliaea fragrans Champ

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Organic Chemistry

Background:

• Ainsliaea fragrans Champ. is a plant species known for its potential chemical constituents.
• Sesquiterpenes and their derivatives are a diverse class of natural products with various biological activities.

Purpose of the Study:

• To isolate and characterize novel chemical compounds from Ainsliaea fragrans Champ.
• To elucidate the structures of new sesquiterpenes and related compounds.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation of novel compounds through comprehensive spectral analysis (e.g., NMR, MS).
• Identification of known compounds by comparing spectral data with literature values.

Main Results:

• Isolation of a new sesquiterpene lactone: 3beta-O-beta-D-glucopyranosyl-8alpha-hydroxy-11alpha,13-dihydrozaluzanin C (1).
• Isolation of a novel trinorguaiane-type sesquiterpene: 4beta,10alpha-dimethyl-1beta,5alpha-bicycle[3,5,0]dec-6-en-4alpha,10beta-diol (2).
• Identification of three known compounds: glucozaluzanin C (3), 11alpha,13-dihydrozaluzanin C (4), and 8alpha-hydroxy-11alpha,13-dihydrozaluzanin C (5).

Conclusions:

• The study successfully identified two new sesquiterpenes from Ainsliaea fragrans Champ.
• The structural elucidation provides valuable data on the chemical diversity of this plant.
• This research contributes to the understanding of sesquiterpene chemistry in the Ainsliaea genus.