Isoswertisin flavones and other constituents from Peperomia obtusifolia
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Data
2011-01-01
Autores
Mota, Jonas da S. [UNESP]
Leite, Ana C. [UNESP]
Kato, Massuo J.
Young, Maria Claudia M.
Bolzani, Vanderlan da Silva [UNESP]
Furlan, Maysa [UNESP]
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Título de Volume
Editor
Taylor & Francis Ltd
Resumo
A phytochemical investigation of the leaves and stems of Peperomia obtusifolia (Piperaceae) yielded a new flavone C-diglycoside isoswertisin-4`-methyl-ether-2 ''alpha-L-rhamnoside (1), along with four known compounds: isoswertisin-2 ''alpha-L-rhamnoside (2), (+)-diayangambin (3), 2-episesalatin (4) and corchoionoside C (5). The structures of the two flavone C-diglycosides (1, 2) were elucidated on the basis of 1D and 2D NMR spectroscopy and MS spectrometric data. These flavones were evaluated by bioautographic assay against Cladosporium cladosporioides and C. sphaerospermum and showed weak antifungal activity.
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Palavras-chave
Piperaceae, Peperomia obtusifolia, flavones
Como citar
Natural Product Research. Abingdon: Taylor & Francis Ltd, v. 25, n. 1, p. 1-7, 2011.