Biflavonoids and a glucopyranoside derivative from Ouratea semiserrata.
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Data
2002
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Resumo
Two new biflavonoids, 5-hydroxy-7-methoxyflavone-(4 →O→8 )-4 ,5 ,7 -trihydroxyflavone and 5-hydroxy-
7-methoxyflavone-(4 →O→8 )-5 ,7 -dihydroxy-4 -methoxyflavone, and the glucopyranoside
derivative, 1-O-(4-hydroxyphenyl)-6-O-(4-hydroxybenzoyl)- -D-glucopyranoside, as well as the known
biflavones lanaraflavone, amentoflavone and podocarpusflavone, the triterpenes lupeol and friedelin, the
lignans eudesmin and epieudesmin, the flavonol glycoside rutin, the steroids -sitosterol, stigmasterol, 3 -
O- -D-glucopyranosylsitosterol, 7-oxostigmast-5-en-3 -ol and 7-oxostigmasta-5,22-dien-3 -ol, the carbohydrates
- and -glucopyranose and 1-O-(4-hydroxybenzoyl)- -D-glucopyranoside, and the norsesquiterpene
6,9-dihydroxymegastigma-4,7-dien-3-one, have been isolated from leaves and branches of Ouratea
semiserrata. The structures of these compounds were established from spectral data, including twodimensional
NMR experiments and mass spectra.
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Two-dimensional NMR spectroscopy, Mass spectroscopy, Biflavones, Glucopyranoside derivatives
Citação
VELANDIA, J. R. et al. Biflavonoids and a glucopyranoside derivative from Ouratea semiserrata. Phytochemical Analysis, v. 13, n.1, p. 283-292, 2002. Disponível em: <http://onlinelibrary.wiley.com/doi/10.1002/pca.656/epdf>. Acesso em: 20 abr. 2017.