RESUMO
A new phenylpropanoid glycoside, crenatoside, as well as the known phenylpropanoid, acteoside, have been isolated from the aerial parts of Orobanche crenata. Their structures have been determined by spectroscopic methods as well as by means of chemical evidence.
Assuntos
Ácidos Cafeicos/isolamento & purificação , Glucosídeos/isolamento & purificação , Glicosídeos/isolamento & purificação , Plantas/química , Ácidos Cafeicos/química , Sequência de Carboidratos , Glucosídeos/química , Glicosídeos/química , Espectroscopia de Ressonância Magnética , Dados de Sequência Molecular , Estrutura MolecularRESUMO
A new phenylpropanoid glycoside, 2'-O-acetylpoliumoside, as well as two known compounds--acteoside and 2'-O-acetylacteoside--have been isolated from the aerial parts of Orobanche ramosa. The structures have been elucidated by spectroscopic methods and supported by chemical evidences.
Assuntos
Catecóis/isolamento & purificação , Glicosídeos/isolamento & purificação , Plantas/química , Sequência de Carboidratos , Catecóis/química , Glicosídeos/química , Espectroscopia de Ressonância Magnética , Dados de Sequência Molecular , Plantas/parasitologiaRESUMO
From the methanolic extract of the whole plant of VERONICA BELLIDIOIDES L., ehrenoside, a new phenylpropanoid glycoside has been isolated. The structure of this compound has been elucidated on the basis of chemical and spectral data as 3, 4-dihydroxy-beta-phenylethoxy- O-alpha- L-arabinopyranosyl-(1 --> 2)-alpha- L-rhamnopyranosyl-(l --> 3)-4- O-caffeoyl-beta D-glucopyranoside ( 1).
RESUMO
The isolation of acteoside and coniferin from Paulownia tomentosa bark along with the previously reported phenolic glucoside syringin is described. The structure of both, acteoside and coniferin, have been assigned by (1)H- and (13)C-NMR spectroscopy.
