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Advisor(s)
Abstract(s)
In this study, an ethanolic extract from Portuguese
propolis was prepared, fractionated by highperformance
liquid chromatography, and the identification
of the phenolic compounds was done by electrospray mass
spectrometry in the negative mode. This technical approach
allowed the identification of 37 phenolic compounds,
which included not only the typical phenolic acids and
flavonoids found in propolis from temperate zones but also
several compounds in which its occurrence have never been
referred to in the literature. Four of the novel phenolic
compounds were methylated and/or esterified or hydroxylated
derivatives of common poplar flavonoids, although six
peculiar derivatives of pinocembrin/pinobanksin, containing
a phenylpropanoic acid derivative moiety in their
structure, were also identified. Furthermore, the Portuguese
propolis sample was shown to contain a p-coumaric ester
derivative dimer.
Description
Keywords
Phenolic compounds Flavonoids Phenolic acids Mass spectrometry Electrospray ionization
Citation
Falcão, S.; Vilas-Boas, M.; Estevinho, L.M.; Barros, C.; Domingues, M.R.M.; Cardoso, S.M. ( 2010). Phenolic characterization of Northeast Portuguese propolis: usual and unusual compounds. Analytical and Bioanalytical Chemistry. ISSN 396:2, p. 887-897
Publisher
Springer