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Structure elucidation and total assignment of 1 H and 13 C NMR data for a new bisdesmoside saponin from Cordia piauhiensis
Author(s) -
Santos Renata P.,
Viana Francisco A.,
Lemos Telma Leda G.,
Silveira Edilberto R.,
BrazFilho Raimundo,
Pessoa Otília Deusdênia L.
Publication year - 2003
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.1241
Subject(s) - chemistry , dept , saponin , two dimensional nuclear magnetic resonance spectroscopy , carbon 13 nmr , stereochemistry , ursolic acid , nmr spectra database , nuclear magnetic resonance spectroscopy , proton nmr , spectral line , chromatography , medicine , alternative medicine , pathology , physics , astronomy
Extensive 1D ( 1 H NMR, HBBD‐ 13 C NMR, DEPT‐ 13 C NMR) and 2D (COSY, TOCSY, NOESY, HMQC and HMBC) NMR analysis was used to characterize the structure of a new bisdesmoside saponin isolated from the methanol extract of stems of Cordia piauhiensis Fresen as 3β‐ O ‐[α‐ L ‐rhamnopyranosyl‐(1 → 2)‐β‐ D ‐glucopyranosyl]ursolic acid 28‐ O ‐[β‐ D ‐glucopyranosyl‐(1 → 6)‐β‐ D ‐glucopyranosyl] ester. Copyright © 2003 John Wiley & Sons, Ltd.