| Autor: |
Mbwambo, Zakaria H., Foubert, Kenne, Chacha, Musa, Kapingu, Modest C., Magadula, Joseph J., Moshi, Mainen M., Lemi�re, Filip, Goubitz, Kees, Fraanje, Jan, Peschar, Ren�, Vlietinck, Arnold, Apers, Sandra, Pieters, Luc |
| Zdroj: |
Planta Medica; 2009, Vol. 75 Issue 3, p262-267, 6p |
| Abstrakt: |
Four furanoditerpenoids were isolated from roots of Croton jatrophoides (Euphorbiaceae) collected in Tanzania. In addition to the known compounds penduliflaworosin and teucvin (mallotucin A), a new teucvin isomer, which was named isoteucvin, and a furanoditerpenoid with a new skeleton, for which the name jatrophoidin was adopted, were isolated. Their structures were elucidated by spectroscopic methods such as ESI-MS and NMR, including 1H-, 13C-, and two-dimensional NMR. The crystal structures of isoteucvin and jatrophoidin were solved using single-crystal X-ray diffraction, by which we also established the absolute configuration of jatrophoidin. The refined crystal structure of isoteucvin has the same (absolute) configuration as jatrophoidin, although the X-ray diffraction data of isoteucvin were not conclusive with respect to the absolute configuration. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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