An unusual homoisoflavanone and a structurally-related dihydrochalcone from Polygonum ferrugineum (Polygonaceae) |
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Authors: | López Silvia N Sierra Manuel Gonzalez Gattuso Susana J Furlán Ricardo L Zacchino Susana A |
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Institution: | Farmacognosia, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531 2000, Rosario, Argentina. |
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Abstract: | 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-alpha-hydroxymethyl-beta-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 (Polygonaceae). To our knowledge, this is the first report of the isolation of a homoisoflavanone from the Polygonum genus and the Polygonaceae family, and could be an important chemotaxonomic finding. In addition, the pattern of substitution of this homoisoflavanone is different from others previously reported. |
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Keywords: | Polygonum ferrugineum Polygonaceae Homoisoflavanone Dihydrochalcone Flavanones Chalcones 5 7-Dihydroxy-6-methoxy-3-(9-hydroxy-phenylmethyl)-chroman-4-one 2′ 4′ 6′-Trihydroxy-3′-methoxy-α-hydroxymethyl-β-hydroxydihydrochalcone |
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