Two new dammarane-type ginsenosides from Panax ginseng

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Pharmacognosy

Background:

• Ginseng (Panax ginseng) is a well-known medicinal herb with a complex chemical profile.
• Dammarane-type ginsenosides are a major class of bioactive compounds found in ginseng, exhibiting diverse pharmacological activities.
• Isolation and structural elucidation of novel ginsenosides contribute to understanding ginseng's therapeutic potential.

Purpose of the Study:

• To isolate and characterize new dammarane-type ginsenosides from wild ginseng (Panax ginseng).
• To determine the chemical structures of isolated compounds using comprehensive analytical techniques.
• To contribute to the phytochemical knowledge of Panax ginseng.

Main Methods:

• Isolation of compounds from the radix and rhizome of wild ginseng.
• Structure elucidation using 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy.
• High-Resolution Electrospray Ionization Mass Spectrometry (HR-ESI-MS) and hydrolysis reactions for structural confirmation.

Main Results:

• Two new dammarane-type ginsenosides, named Ginsenoside Rb6 and (20Z)-Ginsenoside Rh4, were identified.
• Five known ginsenosides (compounds 1, 3, 5, 6, 7) were also isolated.
• The structures were rigorously determined through a combination of spectroscopic analyses and chemical methods.

Conclusions:

• The study successfully identified and characterized novel ginsenosides from wild ginseng.
• The findings expand the known repertoire of dammarane-type ginsenosides in Panax ginseng.
• This research provides valuable chemical data for further investigation into the biological activities of these compounds.