Phenolic components of the wood and roots of far-east yew (Taxus cuspidata) have been isolated and investigated. Four lignans [(+)-taxiresinol, (+)-isotaxiresinol, (+)-isolariciresinol, (−)-secoisolariciresinol] and two catechins [(+)-catechin, (−)-epicatechin] were identified using spectroscopic techniques. HPLC data showed that wood, bark, roots, stems, and needles of the plant contain different amounts of lignans and catechins. The antioxidant and radical-scavenging activities of the polyphenols were evaluated on two in vitro model systems.
DPPH EtOH Polyphenol Catechin Caffeic Acid
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