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Eudesmane-type sesquiterpenoids 3α-(2,3-epoxy-2-methylbutyryloxy)-4α-formoxy-11-hydroxy-6,7-dehydroeudesman-8-one (1) and 3α-(2,3-epoxy-2-methylbutyryloxy)-4α,7α,11-trihydroxyeudesman-8-one (2), together with 10 known structurally related eudesmanes were isolated from the CHCl 3 extract of aerial parts of Pluchea sagittalis (Lamarck) Cabrera. Their structures were deduced by extensive application...
The homoisoflavanone 5,7-dihydroxy-6-methoxy-3-(9-hydroxy-phenylmethyl)-chroman-4-one (1) and its structurally related 2′,4′,6′-trihydroxy-3′-methoxy-α-hydroxymethyl-β-hydroxy-dihydrochalcone (2) along with the known pashanone (3), flavokawin B (4) and cardamonin or alpinetin chalcone (5) pinostrobin (6) and 5,8-dimethoxy-7-hydroxychroman-4-one (7) were isolated from dry leaves of Polygonum ferrugineum...
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