title: Complete assignments of 1H and 13C NMR spectral data for benzylidenebenzyl butyrolactone lignans.
abstract: 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.
authors.affiliation: 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
authors.forename: Rosangela
authors.initials: R
authors.lastname: da Silva
authors.forename: Susimaire
authors.initials: S
authors.lastname: Pedersoli
authors.forename: Valdemar
authors.initials: V
authors.lastname: Lacerda
authors.forename: Paulo Marcos
authors.initials: PM
authors.lastname: Donate
authors.forename: Sérgio
authors.initials: S
authors.lastname: de Albuquerque
authors.forename: Jairo Kenupp
authors.initials: JK
authors.lastname: Bastos
authors.forename: Ana Lúcia Santos
authors.initials: AL
authors.lastname: de Matos Araújo
authors.forename: Márcio Luis
authors.initials: ML
authors.lastname: Andrade e Silva
mesh_terms: D002247:Carbon Isotopes; D017705:Lignans / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D015394:Molecular Structure; D011522:Protons; D012015:Reference Standards
chemical_list: D002247:Carbon Isotopes; D017705:Lignans; D011522:Protons; C507897:carthamogenin; C507896:gossipifan; C425325:savinin