3-Hydroxydihydrobenzofuran glucosides from Gnaphalium polycaulon

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Gnaphalium polycaulon is a plant species known for its traditional medicinal uses.
• The chemical constituents of Gnaphalium species are of interest for potential pharmacological activities.

Purpose of the Study:

• To isolate and characterize chemical compounds from the aerial parts of Gnaphalium polycaulon.
• To determine the structures and absolute configurations of the isolated natural products.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structure elucidation through comprehensive spectroscopic analyses (NMR, MS, etc.).
• Determination of absolute configurations using advanced analytical methods.

Main Results:

• Isolation of four compounds: gnaphaliol 3-O-β-D-glucopyranoside (1), gnaphaliol 9-O-β-D-glucopyranoside (2), (Z)-3-hexenyl O-β-D-glucopyranoside (3), and adenosine (4).
• Identification of a new 3-hydroxydihydrobenzofuran glucoside, gnaphaliol 9-O-β-D-glucopyranoside (2).
• Determination of the absolute configurations of compound 1 as 2R and 3R.

Conclusions:

• The study successfully identified and characterized several compounds from Gnaphalium polycaulon, including a novel glucoside.
• The findings contribute to the understanding of the phytochemical profile of Gnaphalium species.
• The elucidated structures provide a basis for further investigation into the biological activities of these compounds.