The aim of the study was to investigate whether the polyphenolic-polysaccharide conjugates (PPCs), isolated from flowers of Sanguisorba officinalis L. and Erigeron canadensis L., and from leaves of Fragaria vesca L. and Rubus plicatus Whe. Et N. E., can protect human peripheral blood mononuclear
Two new gamma-pyranone derivatives and a new triterpene, together with eight known compounds, were isolated from the aerial parts of Erigeron annuus. Their structures were elucidated by spectroscopic methods. Besides, the anti-tumor activities of the gamma-pyranone derivatives to human hepatoma
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