Peracylated Glucosyl Kaempferols from Pasania dodonfifolia Leaf

Area of Science:

• Phytochemistry
• Natural Product Chemistry
• Organic Chemistry

Background:

• Pasania dodoniifolia is a plant species with potential medicinal properties.
• Phytochemical studies are crucial for identifying bioactive compounds in medicinal plants.
• Ethanolic extracts are commonly used to isolate plant secondary metabolites.

Purpose of the Study:

• To conduct a phytochemical investigation of the ethanolic extract of Pasania dodoniifolia leaf.
• To isolate and characterize novel compounds from the plant extract.
• To elucidate the structures of new kaempferol 3-O-peracylated glucosides.

Main Methods:

• Extraction of Pasania dodoniifolia leaf using ethanol.
• Isolation of compounds using chromatographic techniques.
• Structure elucidation using 2D NMR spectroscopic analyses and Mass Spectrometry (MS) data.

Main Results:

• Four kaempferol 3-O-peracylated glucosides (1-4) were isolated.
• Four flavonoid glucosides (5-8), epicatechin (9), and (7S, 7'S, 8R, 8'R)-icariol A2 (10) were also identified.
• Two new compounds, kaempferol-3-O-(3",4"-di-O-acetyl-2"-O-(Z)-p-coumaroyl)-6"-O-(E)-p-coumaroyl)-beta-glucopyranoside (3) and 3-O-(3",4"-di-O-acetyl-2",6"-di-O-(Z)-p-coumaroyl)-beta-glucopyranoside (4), were characterized.

Conclusions:

• The ethanolic extract of Pasania dodoniifolia leaf is a rich source of diverse phytochemicals, including novel kaempferol derivatives.
• The structural elucidation of new compounds provides valuable data for natural product chemistry.
• Further research may explore the biological activities of these isolated compounds.