Structure determination of chamaedryosides A—C,three novel nor‐neo‐clerodane glucosides from Teucrium chamaedrys,by NMR spectroscopy |
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| Authors: | Antonio Fiorentino Brigida D'Abrosca Andreina Ricci Severina Pacifico Simona Piccolella Pietro Monaco |
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| Affiliation: | Dipartimento di Scienze della Vita, Laboratorio di Fitochimica, Seconda Università degli Studi di Napoli, Via Vivaldi 43, 81100 Caserta, Italy |
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| 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. Copyright © 2009 John Wiley & Sons, Ltd. |
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| Keywords: | Teucrium chamaedrys Lamiaceae nor‐neo‐clerodane glucosides chamaedryoside A— C spectroscopic analysis |
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