[Chemical Constituents from Polygonum paleaceum]

Area of Science:

• Phytochemistry
• Natural Product Chemistry

Background:

• Polygonum paleaceum is a plant species with potential medicinal properties.
• Understanding its chemical constituents is crucial for further research and application.

Purpose of the Study:

• To isolate and identify the chemical constituents of Polygonum paleaceum.

Main Methods:

• Column chromatography using silica gel, Sephadex HL-20, and macroporous resin.
• Structure elucidation through Mass Spectrometry (MS) and Nuclear Magnetic Resonance (NMR) analysis.

Main Results:

• Ten compounds were isolated and identified: ethyl chlorogenate, methyl chlorogenate, kaempferol-3-O-α-L-rhamnopyranoside, (-)-epicatechin, paleaceolactoside, protocatechuic acid, kaempferol, gallic acid, chlorogenic acid, and isoquercitrin.
• Five of these compounds (ethyl chlorogenate, kaempferol-3-O-α-L-rhamnopyranoside, protocatechuic acid, kaempferol, and isoquercitrin) were isolated from this plant for the first time.

Conclusions:

• The study successfully identified ten chemical constituents from Polygonum paleaceum.
• The first-time isolation of five specific compounds expands the known phytochemical profile of the plant.