| Autor: |
Mafezoli Jair, Santos Regina Helena A., Gambardela Maria Teresa P., Silveira Edilberto R. |
| Jazyk: |
angličtina |
| Rok vydání: |
2003 |
| Předmět: |
|
| Zdroj: |
Journal of the Brazilian Chemical Society, Vol 14, Iss 3, Pp 406-410 (2003) |
| Druh dokumentu: |
article |
| ISSN: |
0103-5053 |
| Popis: |
The fatty portion of the hexane extract from roots of Trigonia fasciculata has been determined by GC/MS analysis of the methyl ester mixture. Seventeen fatty acids were identified and oleic acid (38.8%) was the major component. The GC/MS analysis of the less polar fraction of the non-saponifiable part of the root hexane extract allowed the identification of fifteen sesquiterpenes and alpha-santalene (28.4%) was the major component. Chromatography over silica gel of the more polar fraction allowed the isolation of two known compounds: betulinic acid and friedelin, and a novel diterpene 7-(2-hydroxy-acetyl)-10-hydroxy-tetradecahydro-1-methylene-4b,7,10a-trimethyl -phenantrene (6alpha-hydroxy-15-oxo-allodevadarool), all unknown for the species. Structure determination was accomplished by chemical derivatization, comparison to literature data and spectral analysis, including 2D NMR (COSY, HETCOR, COLOC) and X-ray crystallography. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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