Constituintes polares das folhas de Machaonia brasiliensis (Rubiaceae)

Constituintes polares das folhas de Machaonia brasiliensis (Rubiaceae)

Chemical investigation of the MeOH extract of the leaves of Machaonia brasiliensis (Rubiaceae) resulted in the isolation and identification of 3beta-O-beta-glucopyranosyl stigmasterol, 3beta-O-beta-glucopyranosyl sitosterol, secologanoside, 7-O-beta-glucopyranosyl quercetagetin, 4,5-O-dicaffeoylquinic acid and 5-O-caffeoylquinic acid. The structures of these compounds were established by spectroscopic analysis, including 2D NMR experiments. The chemotaxonomic relevance of the isolation of secologanoside is discussed.

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Bibliographic Details
Main Authors: Santos,Anderson Rogério dos, Barros,Michely Pereira de, Santin,Silvana Maria de Oliveira, Sarragiotto,Maria Helena, Souza,Maria Conceição de, Eberlin,Marcos Nogueira, Meurer,Eduardo Cesar
Format: Digital revista
Language:Portuguese
Published: Sociedade Brasileira de Química 2004
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422004000400002
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