Otro
Isoswertisin flavones and other constituents from Peperomia obtusifolia
Registro en:
Natural Product Research. Abingdon: Taylor & Francis Ltd, v. 25, n. 1, p. 1-7, 2011.
1478-6419
10.1080/14786410903244954
WOS:000286935200001
Autor
Mota, Jonas da S.
Leite, Ana C.
Kato, Massuo J.
Young, Maria Claudia M.
Bolzani, Vanderlan da Silva
Furlan, Maysa
Resumen
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. Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)