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Repositorio Atenea de la Facultad de Ciencias, UNAM >
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Please use this identifier to cite or link to this item:
http://hdl.handle.net/11154/2764
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| Title: | two isomeric glycoside sesquiterpenes from machaeranthera tanacetifolia |
| Authors: | Martínez-Vazquez, M
Bueno, JL
Espinosa, G
Calderon, JS
García, A |
| Issue Date: | 1998 |
| Abstract: | From the aerial parts of Machaeranthera tanacetifolia the known 12-hydroxy-ent-kauren-16-en-19-oic acid and the two previously unknown (-)-11-O-alpha-D-arabinopyranosyl-beta-eudesmol and (+)-11-O-beta-L-arabinopyranosyl-beta-eudesmol were isolated. The structure elucidation of these compounds was based on spectroscopic and chemical evidences. (+)-11-O-beta-L-Arabinopyranosyl-beta-eudesmol was fully characterized by X-ray analysis of its peracetate derivative. According with these results, we propose that the previously reported (+)-11-O-alpha-arabinopyranosyl-beta-eudesmol and 11-O-alpha-D-arabinopyranosyl-beta-eudesmol are identical to (+)-11-O-beta-L-arabinopyranosyl-beta-eudesmol. (C) 1998 Elsevier Science Ltd. All rights reserved. |
| URI: | http://hdl.handle.net/11154/2764 |
| ISSN: | 0031-9422 |
| Appears in Collections: | Departamento de Ecología y Recursos Naturales
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