Please use this identifier to cite or link to this item: https://repositorio.ufpa.br/jspui/handle/2011/2447
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dc.creatorLÔBO, Lívia Trindade-
dc.creatorSILVA, Geilson Alcantara da-
dc.creatorFERREIRA, Malisson-
dc.creatorSILVA, Milton Nascimento da-
dc.creatorSANTOS, Alberdan Silva-
dc.creatorARRUDA, Alberto Cardoso-
dc.creatorGUILHON, Giselle Maria Skelding Pinheiro-
dc.creatorSANTOS, Lourivaldo da Silva-
dc.creatorBORGES, Rosivaldo dos Santos-
dc.creatorARRUDA, Mara Silvia Pinheiro-
dc.date.accessioned2011-12-28T12:41:19Z-
dc.date.available2011-12-28T12:41:19Z-
dc.date.issued2009-
dc.identifier.citationLOBO, Lívia T. et al. Dihydroflavonols from the leaves of Derris urucu (Leguminosae): structural elucidation and DPPH radical-scavenging activity. Journal of the Brazilian Chemical Society, São Paulo, v. 20, n. 6, p. 1077-1081, 2009. Disponível em: <http://www.scielo.br/pdf/jbchs/v20n6/a13v20n6.pdf>. Acesso em: 22 dez. 2011. <http://dx.doi.org/10.1590/S0103-50532009000600013>.pt_BR
dc.identifier.issn0103-5053-
dc.identifier.urihttp://www.repositorio.ufpa.br:8080/jspui/handle/2011/2447-
dc.description.abstractDerris urucu is an Amazonian plant with insecticide and ichthyotoxic properties. Studies with this species show the presence of flavonoids, mainly rotenoids, as well as stilbenes. The ethanol extract of the leaves of Derris urucu (Leguminosae) afforded three new dihydroflavonols named urucuol A (1), B (2) and C (3), and the dihydroflavonol isotirumalin (4). Their structures were elucidated by extensive analysis of 1D and 2D NMR, UV and IR spectra and MS data and comparison with literature data. The isolated compounds (1-4) were evaluated for DPPH• radical scavenging activity and showed a relatively lower antioxidant ability compared to the commercial antioxidant trans-resveratrol.pt_BR
dc.description.provenanceSubmitted by Samira Prince (prince@ufpa.br) on 2011-12-22T13:43:12Z No. of bitstreams: 2 Artigo_DihydroflavonolsLeavesDerris.pdf: 1221590 bytes, checksum: 4c422ae363c117b39a2a7fa9479d7f11 (MD5) license_rdf: 23892 bytes, checksum: afd5dad10b1d1e6dc10c8c5d25222c7a (MD5)en
dc.description.provenanceApproved for entry into archive by Irvana Coutinho(irvana@ufpa.br) on 2011-12-28T12:41:19Z (GMT) No. of bitstreams: 2 Artigo_DihydroflavonolsLeavesDerris.pdf: 1221590 bytes, checksum: 4c422ae363c117b39a2a7fa9479d7f11 (MD5) license_rdf: 23892 bytes, checksum: afd5dad10b1d1e6dc10c8c5d25222c7a (MD5)en
dc.description.provenanceMade available in DSpace on 2011-12-28T12:41:19Z (GMT). No. of bitstreams: 2 Artigo_DihydroflavonolsLeavesDerris.pdf: 1221590 bytes, checksum: 4c422ae363c117b39a2a7fa9479d7f11 (MD5) license_rdf: 23892 bytes, checksum: afd5dad10b1d1e6dc10c8c5d25222c7a (MD5) Previous issue date: 2009en
dc.language.isoengpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectAmazônia brasileira-
dc.subjectQuímica orgânicapt_BR
dc.subjectDerris urucupt_BR
dc.subjectLeguminosapt_BR
dc.subjectAlelopatiapt_BR
dc.subjectAntioxidantespt_BR
dc.subjectFlavonóidespt_BR
dc.titleDihydroflavonols from the leaves of Derris urucu (Leguminosae): structural elucidation and DPPH radical-scavenging activitypt_BR
dc.typeArtigo de Periódicopt_BR
dc.description.resumoDerris 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.pt_BR
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