Two new γ-pyrone glucosides from Paeonia albiflora

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Paeonia albiflora, a traditional medicinal herb, contains various bioactive compounds.
• γ-pyrone glucosides are a class of natural products with potential biological activities.
• Previous phytochemical investigations of P. albiflora have not reported the presence of γ-pyrone glucosides.

Purpose of the Study:

• To isolate and characterize new compounds from the roots of Paeonia albiflora.
• To elucidate the chemical structures of the isolated compounds.
• To evaluate the inhibitory activity of the isolated compounds on tumor necrosis factor-alpha (TNF-α) release in vitro.

Main Methods:

• Phytochemical investigation involving extraction and isolation techniques.
• Structure elucidation using spectral data (NMR, MS) and chemical analysis.
• In vitro bioassay to assess TNF-α release inhibition.

Main Results:

• Two new γ-pyrone glucosides, 2-(hydroxymethyl)-4-oxo-4H-pyran-3-yl-6-O-α-L-rhamnopyranosyl-β-D-glucopyranoside (1) and 2-(hydroxymethyl)-4-oxo-4H-pyran-3-yl-6-O-galloyl-β-D-glucopyranoside (2), were isolated.
• Three known compounds were also identified.
• Compounds 1-5 were evaluated for their inhibitory activity on TNF-α release, with results indicating potential anti-inflammatory properties.

Conclusions:

• This study reports for the first time the presence of γ-pyrone glucosides in Paeonia albiflora.
• The isolated compounds represent novel chemical entities from this plant source.
• The findings suggest that P. albiflora may possess anti-inflammatory potential mediated by these γ-pyrone glucosides.