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Complete assignments of 1H and 13C NMR spectral data for benzylidenebenzyl butyrolactone lignans.

da Silva R, Pedersoli S, Lacerda V, Donate PM, de Albuquerque S, Bastos JK, de Matos Araújo AL, Andrade e Silva ML

Departamento de Análises Clínicas, Toxológicas e Bromatológicas da Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café, s/n, 14040-903 Ribeirão Preto, SP, Brazil. rosilva@usp.br

The structures of three benzylidenebenzyl butyrolactone lignans (gossypifan, carthamogenin, and savinin) have been established on basis of 1H NMR and 13C NMR spectroscopic data. The 1H NMR and 13C NMR spectra of these lignans have been fully assigned by the use of techniques such as gCOSY, non-edited gHSQC, and gHMBC. Complete assignment and most homonuclear hydrogen coupling constant measurements were performed, also providing enough data for the determination of the relative stereochemistry.

Published 3 October 2005 in Magn Reson Chem, 43(11): 966-9.
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