Constituents from Polygonum cuspidatum.

High-performance liquid chromatographic separation is performed to extract active components from the traditional Chinese medicine Polygonum cuspidatum using a trans-resveratrol imprinted polymer. Good separation and purification of trans-resveratrol and emodin from the Polygonum cuspidatum

to extract active components from the traditional Chinese medicine Polygonum cuspidatum using a trans-resveratrol imprinted polymer. Good separation and purification of trans-resveratrol and emodin from the Polygonum cuspidatum extract are achieved after condition optimization. The extraction recoveries are 83% and 99% for trans-resveratol and emodin, respectively. The results show that the mol...

NF-κB Inhibitory Activities of the Methanol Extracts and some Constituents therein of some Vietnamese Medicinal Plants

Eighty-seven methanol extracts of medicinal plants, most of them are currently used in Vietnamese oriental medicine, were screened for NF-κB inhibitory activity. Seven methanol extracts showed strong to moderate inhibitory activity. These include the extracts of Crinum latifolium (leaves), Evodia rutaecarpa (fruits), Polygonum cuspidatum (rhizoma), Perilla ocymoides (leaves), Rubia cordifolia (...

Antioxidant activity of extract from Polygonum cuspidatum.

Numerous diseases are induced by free radicals via lipid peroxidation, protein peroxidation and DNA damage. It has been known that a variety of plant extracts have antioxidant activities to scavenge free radicals. Whether Polygonum cuspidatum Sieb. et Zuce has antioxidant activity is unknown. In this study, dried roots of Polygonum cuspidatum were extracted by ethanol and the extract was lyophi...

Selezione Bibliografica Su Polygonum Cuspidatum E Resveratrolo

A new stilbene glucoside gallate from the roots of Polygonum multiflorum.

A new stilbenoid (1) was isolated from the root extract of Polygonum multiflorum together with eight known constituents (2-9). The chemical structure of 1 was established as the 6''-O-monogalloyl ester of (E)-2,3,4',5-beta-tetrahydroxystilbene-2-beta-D-glucopyranoside based on physicochemical and spectroscopic analyses, particularly by NMR spectroscopic data, i.e., COSY, HMQC and HMBC. Compound...