Química Nova | |
Constituintes químicos isolados de simira glaziovii (K. schum) steyerm. e a atribuição dos deslocamentos químicos dos átomos de carbono e hidrogênio do alcalóide ofiorina e seus derivados | |
Ana Beatriz F. D' O. Bastos2  Mário Geraldo De Carvalho2  Javier Rincón Velandia2  Raimundo Braz-filho1  | |
[1] ,Universidade Federal Rural do Rio de Janeiro Instituto de Ciências Exatas Departamento de QuímicaSeropédica RJ | |
关键词: Simira glaziovii; Rubiaceae; steroids; harmane; (-)-ophiorine; | |
DOI : 10.1590/S0100-40422002000200012 | |
来源: SciELO | |
【 摘 要 】
Chromatographic fractionation of bark extracts from Simira glaziovii (Rubiaceae) afforded the steroids beta-sitostenone, stigmastenone, beta-sitosterol and stigmasterol, methyl trans-4-hidroxy-3-methoxycinamate (1), the alkaloids harmane (2) and the new stereoisomer of ophiorine B (3). The structures were established by ¹H and 13C NMR, including 2D techniques and mass spectral analysis, of the natural products and pentaacetyllyalosidic acid (4a) and beta-carboline monoterpene tetraacetylglucoside (5, 1,22-lactamlyaloside) derivatives obtained by chemical transformations.
【 授权许可】
CC BY-NC
All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License
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