Phenolic constituents and antioxidant activity of geopropolis from two species of amazonian stingless bees
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...
| Autor principal: | Silva, Ellen Cristina Costa da |
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| Outros Autores: | Muniz, Magno Perêa, Nunomura, Rita de Cássia Saraiva, Nunomura, Sergio Massayoshi, Zilse, Gislene Almeida Carvalho |
| Grau: | Artigo |
| Idioma: | pt_BR |
| Publicado em: |
Química Nova
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/16046 |
| Resumo: |
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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-β-D-glucopyranoside and myricetin-3-O-β-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. |