Minor diterpenoid glycosides from the leaves of Stevia rebaudiana
| Autor: | Grant E. Dubois, Dennis J. Milanowski, Venkata Sai Prakash Chaturvedula, Indra Prakash, Ulla Mocek, John F. Clos, Joshua Rhea |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
chemistry.chemical_classification
biology Chemistry Glycoside Steviol Plant Science Asteraceae biology.organism_classification Biochemistry Terpenoid Stevia rebaudiana chemistry.chemical_compound Organic chemistry Stevioside Spectral data Agronomy and Crop Science Heteronuclear single quantum coherence spectroscopy Biotechnology |
| Zdroj: | Phytochemistry Letters. 4:209-212 |
| ISSN: | 1874-3900 |
| DOI: | 10.1016/j.phytol.2011.01.002 |
| Popis: | From the commercial extract of the leaves of Stevia rebaudiana, three new diterpenoid glycosides were isolated besides eight known steviol glycosides including stevioside, rebaudiosides A–F and dulcoside A. The structures of the three compounds were identified as 13-[(2-O-β-d-glucopyranosyl-β-d-glucopyranosyl) oxy]-kaur-16-en-18-oic acid-(6-O-β-d-xylopyranosyl-β-d-glucopyranosyl) ester (1), 13-[(2-O-β-d-glucopyranosyl-β-d-glucopyranosyl) oxy]-17-hydroxy-kaur-15-en-18-oic acid β-d-glucopyranosyl ester (2), and 13-[(2-O-β-d-glucopyranosyl-β-d-glucopyranosyl) oxy]-17-oxo-kaur-15-en-18-oic acid β-d-glucopyranosyl ester (3) on the basis of extensive NMR and MS spectral studies. Another known diterpenoid glycoside, 13-[(2-O-β-d-glucopyranosyl-β-d-glucopyranosyl) oxy]-kaur-15-en-18-oic acid β-d-glucopyranosyl ester (4) was also isolated and its complete NMR spectral assignments were made on the basis of COSY, HSQC and HMBC spectral data. |
| Databáze: | OpenAIRE |
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