Two New Ursane-type Triterpenoid Glycosides from Ilex Cornuta

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Traditional Chinese Medicine

Background:

• Ilex cornuta (I. cornuta) is a plant with a long history of use in Traditional Chinese Medicine (TCM).
• Understanding the chemical constituents of I. cornuta is crucial for elucidating its pharmacological activities.
• Previous phytochemical studies may not have fully explored the chemical diversity of I. cornuta roots.

Purpose of the Study:

• To conduct a phytochemical investigation of the roots of Ilex cornuta.
• To isolate and characterize new and known chemical compounds from I. cornuta roots.
• To contribute to the understanding of the chemical basis for the pharmacological effects of I. cornuta.

Main Methods:

• Extraction of I. cornuta roots using 95% ethanol.
• Partitioning of the crude extract with petroleum ether, ethyl acetate (EtOAc), and n-butyl alcohol.
• Isolation and purification of compounds using various chromatographic techniques, including semipreparative high-performance liquid chromatography (HPLC).
• Structure elucidation using nuclear magnetic resonance (NMR), mass spectrometry (MS), chemical reactions, and gas chromatography (GC).

Main Results:

• Isolation of two new triterpenoid saponins (compounds 1 and 2) and 12 known compounds (compounds 3-14).
• Detailed structural determination of the new compounds: 3β-O-α-D-xylopyranosyl-(1→3)-α-L-2-O-acetylarabinopyranosyl-(1→2)-β-D glucopyranosyl-23-hydroxyl-20α(H)-urs-12-en-28-oic acid 28-O-β-D-glucopyranosyl ester (1) and 3β-O-α-D-xylopyranosly-(1→3)-α-L-2-O-acetylarabinopyranosyl-(1→2)-β-Dglucopyranosyl- 19α,23-dihydroxyl-20α(H)-urs-12-en-28-oic acid 28-O-β-D-glucopyranosyl ester (2).
• Six compounds (4, 6, 8, 11, 12, and 13) were reported from this genus for the first time.

Conclusions:

• The phytochemical investigation successfully identified novel chemical entities from Ilex cornuta roots.
• The study expands the knowledge of triterpenoid saponins in the Ilex genus.
• The findings provide valuable chemical data that may support future research into the pharmacological applications of I. cornuta.