Dihydroflavonols from the leaves of Derris urucu (Leguminosae): Structural Elucidation and DPPH Radical-Scavenging Activity

نویسندگان

  • Lívia T. Lôbo
  • Geilson A. da Silva
  • Malisson Ferreira
  • Milton N. da Silva
  • Alberdan S. Santos
  • Alberto C. Arruda
  • Giselle M. S. P. Guilhon
  • Lourivaldo S. Santos
  • Rosivaldo dos Santos Borges
  • Mara Silvia P. Arruda
چکیده

Derris urucu é uma planta da Amazônia com propriedades inseticida e ictiotóxica. Estudos com esta espécie reportam a presença de flavonóides, principalmente rotenóides, bem como de estilbenos. A partir do extrato etanólico das folhas de Derris urucu (Leguminosae), três novos diidroflavonóides, denominados urucuol A (1), B (2) e C (3) e o diidroflavonol isotirumalina (4), foram isolados e identificados. As estruturas destes compostos foram elucidadas por uma extensiva análise espectroscópica de RMN uni e bidimensional, UV, IV e dados de EM, além de comparação com dados da literatura. Os compostos isolados (1-4) foram avaliados quanto ao seu potencial sequestrador do radical DPPH e apresentaram baixo poder antioxidante quando comparados ao antioxidante comercial trans-resveratrol.

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تاریخ انتشار 2009