Three new nor-neo-clerodane diterpenes, named chamaedryoside A (1), B (2) and C (3), have been isolated from the organic extracts of Teucrium chamaedrys (L.) and their structural characterization has been accomplished by 1H and 13C-NMR spectra, and DEPT, by COSY, TOCSY, HSQC, HSQC-TOSCY and HMBC experiments, as well as by ESI-MS/MS techniques. The stereostructures have been elucidated by NOESY and computational calculations. © 2009 John Wiley & Sons, Ltd.
Structure determination of chamaedryosides A-C, threenovel nor-neo-clerodane glucosides from Teucrium chamaedrys,byNMR spectroscopy
FIORENTINO, Antonio;D'ABROSCA, Brigida;RICCI, Andreina;PACIFICO, Severina;PICCOLELLA, Simona;MONACO, Pietro
2009
Abstract
Three new nor-neo-clerodane diterpenes, named chamaedryoside A (1), B (2) and C (3), have been isolated from the organic extracts of Teucrium chamaedrys (L.) and their structural characterization has been accomplished by 1H and 13C-NMR spectra, and DEPT, by COSY, TOCSY, HSQC, HSQC-TOSCY and HMBC experiments, as well as by ESI-MS/MS techniques. The stereostructures have been elucidated by NOESY and computational calculations. © 2009 John Wiley & Sons, Ltd.File in questo prodotto:
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