Triterpenes from Callicarpa integerrima Champ.

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Medicinal Plant Research

Background:

• Callicarpa integerrima Champ is utilized in traditional Chinese medicine for its hemostatic and anti-inflammatory properties.
• Triterpenoids are a diverse class of natural compounds with a wide range of biological activities.
• Investigating the chemical constituents of medicinal plants can lead to the discovery of novel therapeutic agents.

Purpose of the Study:

• To isolate and identify the chemical constituents from the methanol extract of Callicarpa integerrima stems and leaves.
• To characterize a new triterpenoid saponin and fourteen known triterpenoids.
• To report compounds isolated from the genus Callicarpa for the first time.

Main Methods:

• Extraction of plant material using methanol.
• Isolation of compounds using various chromatographic techniques (silica gel, Sephadex LH-20, RP-C18).
• Structure elucidation using spectroscopic methods (NMR, HMBC, IR, MS).

Main Results:

• A new triterpenoid saponin, 2alpha, 3beta, 19alpha, 23-tetrahydroxy-olean-12-en-28-oic acid-28-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucopyranoside, was identified.
• Fourteen known triterpenoids, including oleanolic acid, ursolic acid, and hederagenin, were isolated and identified.
• Compounds 3 (3-acetyl oleanolic acid), 4 (3beta-O-acetyl ursolic acid), and 15 (pruvuloside A) were reported from the genus Callicarpa for the first time.

Conclusions:

• The study successfully isolated and identified a novel triterpenoid saponin and several known triterpenoids from Callicarpa integerrima.
• The findings expand the knowledge of the chemical diversity of triterpenoids in the genus Callicarpa.
• This research provides a basis for further investigation into the pharmacological activities of these isolated compounds.