Constituintes fenólicos e atividade antioxidante da geoprópolis de duas espécies de abelhas sem ferrão amazônicas

Química Nova

Ellen Cristina Costa Da Silva²  Magno Perêa Muniz²  Rita De Cássia Saraiva Nunomura²  Sergio Massayoshi Nunomura¹  Gislene Almeida Carvalho Zilse¹ 

[1] ,Universidade Federal do Amazonas Instituto de Ciências Exatas Departamento de QuímicaManaus AM ,Brasil

关键词: flavonoides;    geopropolis;    Melipona;   

DOI  :  10.1590/S0100-40422013000500003

来源: SciELO

【 摘 要 】

We investigated the phenolic constituents and antioxidant activity of geopropolis from two species of stingless Amazonian bees, Melipona interrupta and Melipona seminigra. The chemical investigation of geopropolis from Melipona interrupta led to the isolation of 5,7,4'-trihydroxyflavonone, 3,5,6,7,4'-pentahydroxyflavonol, naringenine-4'-O-b-D-glucopyranoside and myricetin-3-O-b-D-glucopyranoside. Their structures were assigned based on spectroscopic analyses, including two-dimensional NMR techniques. Antioxidant activity of methanol and ethanol extracts of M. interrupta and M. seminigra were measured using the 1,2-diphenyl-2-picryl-hydrazyl (DPPH) free radical scavenging assay. This is also the first work reporting the chemical investigation of stingless bee species from the Amazonian region.

【 授权许可】

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