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

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.

Bibliographic Details

Main Authors:	Silva,Ellen Cristina Costa da, Muniz,Magno Perêa, Nunomura,Rita de Cássia Saraiva, Nunomura,Sergio Massayoshi, Zilse,Gislene Almeida Carvalho
Format:	Digital revista
Language:	Portuguese
Published:	Sociedade Brasileira de Química 2013
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000500003
Tags:	Add Tag No Tags, Be the first to tag this record!