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Structure du virescenoside C, nouveau métabolite de Oospora virescens (Link) Wallr.
- Source :
-
European Journal of Biochemistry . 1970, Vol. 15 Issue 2, p356-359. 4p. - Publication Year :
- 1970
-
Abstract
- Chemical investigation of the glycosidic constituents of Oospora virescens (Link) Wallr. resulted in the isolation of several glycosides. We have shown recently that two of them, named virescenoside A (I) and B (II) are β-D-altropyranosides of virescenol A and B; these diterpenic aglycones have been found to have the structure of isopimaradien-α,3β-19-triol (JV) and isopimaradien-3β,19-diol (V), respectively. In this paper we describe the isolation and structure of virescenoside C, a new metabolite of Oospora virescens. The results obtained show that virescenoside C (IIIa), C26K40O7, m. p. 160-162°, [α]D -71,4Y°, is a β-D-altropyranoside of virescenol C, which is found to have the structure of 3-keto 19-hydroxy isopimaradiene (VIa). These results are based on physical evidence (infra-red, nuclear magnetic resonance and mass spectra) and particularly on the chemical correlation with virescenol B and virescenoside B. Virescenoside C seems to be the third example of an altroside found in nature, [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00142956
- Volume :
- 15
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- European Journal of Biochemistry
- Publication Type :
- Academic Journal
- Accession number :
- 13455466
- Full Text :
- https://doi.org/10.1111/j.1432-1033.1970.tb01015.x