A new aryltetrahydronaphthalene lignan from Epimedium brevicornum

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A new aryltetrahydronaphthalene lignan,(+)-cycloolivil formaldehyde condensate(1),was isolated from the whole plants of Epimedium brevicornum(Berberidaceae).Its structure was elucidated on the basis of MS,ID and 2D NMR techniques.
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