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Título: | Phenolic metabolites from Pyrus calleryana and evaluation of its free radical scavenging activity |
Autor: | Nassar, Mahmoud I.; Mohamed, Tahia K.; El-Toumy, Sayed A.; Gaara, Ahmed H.; El-Kashak, Walaa A.; Brouard, Ignacio CSIC ORCID ; El-Kousy, Salah M. | Palabras clave: | Pyrus calleryana Rosaceae Phenolic glycosides Free radicals scavenging activity |
Fecha de publicación: | 3-ene-2011 | Editor: | Elsevier | Citación: | Carbohydrate Research 346(1): 64-67 (2011) | Resumen: | Investigation of the aqueous alcoholic extract of Pyrus calleryana Decne. leaves led to the isolation of two new phenolic acids glycosides, namely protocatechuoylcalleryanin-3-O-β-glucopyranoside (1) and 3′-hydroxybenzyl-4-hydroxybenzoate-4′-O-β-glucopyranoside (2), together with nine known compounds among them lanceoloside A and methylgallate, which have been isolated for the first time from the genus Pyrus. Structures of the isolated compounds were established by spectroscopic analysis, including UV, IR, HRESI-MS, and 1D/2D NMR. The total extract and some isolated compounds were determined against DPPH (2,2-diphenyl-1-(2,4,6-trinitrophenyl) hydrazinyl radical, for their free radical scavenging activity, the total alcoholic extract showed strong antioxidant activity while the two new compounds showed weak antioxidant activity. | Versión del editor: | http://dx.doi.org/10.1016/j.carres.2010.11.007 | URI: | http://hdl.handle.net/10261/205383 | DOI: | 10.1016/j.carres.2010.11.007 | Identificadores: | doi: 10.1016/j.carres.2010.11.007 issn: 0008-6215 e-issn: 1873-426X |
Aparece en las colecciones: | (IPNA) Artículos |
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