Isolation and structure elucidation of two new flavonoid glycosides from the infusion of Maytenus aquifolium leaves. Evaluation of the antiulcer activity of the infusion
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Data
1999-02-01
Autores
Vilegas, Wagner [UNESP]
Sanommiya, M.
Rastrelli, L.
Pizza, C.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Amer Chemical Soc
Resumo
Droplet countercurrent chromatography and high-performance liquid chromatography fractionation of the aqueous infusion from Maytenus aquifolium Martius leaves afforded two flavonoid tetrasaccharides: quercetin 3-O-alpha-L-rhamnopyranosyl(1-->6)-O-[beta-D-glucopyranosyl(1-->3)-O-alpha-L-rhamnopranosyl( 1-->2)-O-beta-D-galactopyranoside and kaempferol 3-O-alpha-L-rhamnopyranosyl(1-->6)-O-[beta-D-glucopyranosyl( 1-->3)-O-alpha-L-rhamnopyranosy(1-->2-2)-O-beta-D-galactopyranoside. All structures were elucidated by spectroscopic methods. Pharmacological essays of the infusion showed antiulcer activity in rats.
Descrição
Palavras-chave
Maytenus aquifolium Martius, Celastraceae, espinheira santa, infusion, antiulcer activity, flavonoid glycosides, 1D and 2D NMR
Como citar
Journal of Agricultural and Food Chemistry. Washington: Amer Chemical Soc, v. 47, n. 2, p. 403-406, 1999.