Xeractinol - A new flavanonol C-glucoside from Paepalanthus argenteus var. argenteus (Bongard) Hensold (Eriocaulaceae)
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Data
2007-01-01
Autores
Dokkedal, Anne Ligia
Lavarda, Francisco
dos Santos, Lourdes Campaner
Vilegas, Wagner [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Soc Brasileira Quimica
Resumo
New compound isolated from methanolic extract from the leaves of Paepalanthus argenteus var. argenteus (Bongard) Hensold was characterized as xeractinol, a new dihydroflavonol C-glucoside. The structure was elucidated on the basis of extensive spectroscopic analysis (1D and 2D NMR, MS, HREIMS, IR and UV). Ab initio electronic structure calculations support our proposal to the molecular structure. The dihydroflavonol herein isolated may serve as taxonomic marker of Paepalanthus subgenus Xeractis, because this flavonoid have not been reported in any other taxon of Eriocaulaceae.
Descrição
Palavras-chave
Paepalanthus argenteus var. argenteus, Eriocaulaceae, dihydroflavonol, xeractinol, ab initio calculations
Como citar
Journal of the Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 18, n. 2, p. 437-439, 2007.