Two new steroidal saponins from Tribulus terrestris

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Organic Chemistry

Background:

• Tribulus terrestris is a plant with a history of traditional medicinal use.
• The phytochemical investigation of medicinal plants is crucial for discovering novel bioactive compounds.
• Steroidal saponins and flavonoids are classes of natural products with diverse biological activities.

Purpose of the Study:

• To isolate and characterize new and known compounds from the fruits of Tribulus terrestris.
• To elucidate the chemical structures of isolated compounds using spectroscopic and chemical methods.

Main Methods:

• Extraction of compounds from Tribulus terrestris fruits.
• Purification of isolated compounds using chromatographic techniques.
• Structure elucidation through comprehensive spectroscopic analysis (e.g., NMR, Mass Spectrometry) and chemical reactions.

Main Results:

• Isolation of two novel steroidal saponins, compounds 1 and 2.
• Identification of two known flavonoid glycosides, kaempferol-3-gentiobioside (3) and isorhamnetin-3-gentiobioside (4).
• Detailed structural assignments for all four isolated compounds, including stereochemistry.

Conclusions:

• The study successfully identified four compounds from Tribulus terrestris fruits, including two new steroidal saponins.
• The findings expand the knowledge of the phytochemical profile of Tribulus terrestris.
• The characterized compounds may serve as leads for further pharmacological investigations.