<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2008000200001</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Antioxidant Constituents of Geranium bellum Rose]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camacho-Luis]]></surname>
<given-names><![CDATA[Abelardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gayosso-De-Lucio]]></surname>
<given-names><![CDATA[Juan A.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres-Valencia]]></surname>
<given-names><![CDATA[J. Martín]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Sánchez]]></surname>
<given-names><![CDATA[José L.]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón-Hernández]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[Rogelio]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrón]]></surname>
<given-names><![CDATA[Blanca L.]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Área Académica de Farmacia ]]></institution>
<addr-line><![CDATA[ Hidalgo]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Autónoma del Estado de Hidalgo Centro de Investigaciones Químicas ]]></institution>
<addr-line><![CDATA[ Hidalgo]]></addr-line>
<country>México</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Bioquímica]]></institution>
<addr-line><![CDATA[México D.F]]></addr-line>
<country>México</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Virología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2008</year>
</pub-date>
<volume>52</volume>
<numero>2</numero>
<fpage>103</fpage>
<lpage>107</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2008000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2008000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2008000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Radical scavenging assay-guided fractionation of the antioxidant EtOAc and MeOH extracts from the aerial parts of Geranium bellum resulted in the isolation of &#946;-sitosterol 3-O-&#946;-D-glucopiranoside (1), quercetin 3-O-&#945;-L-(2"-O-acetyl)arabinofuranoside (2), quercetin 3-O-&#945;-L-arabinofuranoside (3), quercetin (4), methyl gallate (5), gallic acid (6), methyl brevifolin carboxylate (7), and dehydrochebulic acid trimethyl ester (8). These substances were fully characterized by 1D and 2D NMR spectroscopy as well as by their physical properties. 2,2'-Azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging activities for the extracts, primary fractions and pure compounds were determined. Compounds 2-4 showed very strong ABTS radical scavenging activity, whereas compound 5-8 had moderate activity and compound 1 was weakly active. Compounds 2, 7 and 8 are isolated for the first time from Geranium.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La separación dirigida mediante captura de radicales libres de los extractos antioxidantes de AcOEt y MeOH de las partes aéreas de Geranium bellum condujo al aislamiento de 3-O-&#946;-D-glucopiranósido de &#946;-sitosterol (1), 3-O-&#945;-L-(2"-O-acetil)arabinofuranósido de quercetina (2), 3-O-&#945;-L-arabinofuranósido de quercetina (3), quercetina (4), galato de metilo (5), ácido gálico (6), brevifolin carboxilato de metilo (7) y el éster trimetílico del ácido dehidrochebúlico (8). Las sustancias fueron completamente caracterizadas mediante espectroscopía de RMN en 1D y 2D, así como por sus propiedades físicas. Se determinó las capacidades de captura de radicales del ácido 2,2'-azino-bis(3-etilbenzotiazolina-6-sulfónico) (ABTS) para los extractos, fracciones primarias y compuestos puros. Los compuestos 2-4 mostraron fuerte actividad de captura de radicales, mientras que los compuestos 5-8 presentaron actividad moderada y el compuesto 1 fue débilmente activo. Esta es la primera vez que los compuestos 2, 7 y 8 se aíslan de Geranium.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Geranium bellum Rose]]></kwd>
<kwd lng="en"><![CDATA[Geraniaceae]]></kwd>
<kwd lng="en"><![CDATA[antioxidant activity]]></kwd>
<kwd lng="en"><![CDATA[flavonoids]]></kwd>
<kwd lng="en"><![CDATA[tannins]]></kwd>
<kwd lng="en"><![CDATA[1H and 13C NMR spectroscopy]]></kwd>
<kwd lng="es"><![CDATA[Geranium bellum Rose]]></kwd>
<kwd lng="es"><![CDATA[Geraniaceae]]></kwd>
<kwd lng="es"><![CDATA[actividad antioxidante]]></kwd>
<kwd lng="es"><![CDATA[flavonoides]]></kwd>
<kwd lng="es"><![CDATA[taninos]]></kwd>
<kwd lng="es"><![CDATA[espectroscopía de RMN de ¹H y 13C]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Article</font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Antioxidant Constituents of <i>Geranium bellum </i>Rose</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>Abelardo Camacho&#150;Luis,<sup>1</sup> Juan A. Gayosso&#150;De&#150;Lucio,<sup>2</sup> J. Mart&iacute;n Torres&#150;Valencia,<sup>2* </sup>Jos&eacute; L. Mu&ntilde;oz&#150;S&aacute;nchez,<sup>3*</sup> Ernesto Alarc&oacute;n&#150;Hern&aacute;ndez,<sup>3</sup> Rogelio L&oacute;pez,<sup>4</sup> Blanca L. Barr&oacute;n<sup>4</sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> &Aacute;rea Acad&eacute;mica de Farmacia, Universidad Aut&oacute;noma del Estado de Hidalgo, Km 4.5 Carretera Pachuca&#150;Tulancingo, Ciudad Universitaria, Mineral de la Reforma, Hidalgo 42076 M&eacute;xico. Phone: +52 771 717 2000 (2206). Fax: +52 771 717&#150;2000 (6502).</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>2</sup>Centro de Investigaciones Qu&iacute;micas, Universidad Aut&oacute;noma del Estado de Hidalgo, Km 4.5 Carretera Pachuca&#150;Tulancingo, Ciudad Universitaria, Mineral de la Reforma, Hidalgo 42076 M&eacute;xico. Phone: +52 771 717 2000 (2206). Fax: +52 771 717&#150;2000 (6502).<sup>*</sup>Responsible author:</i> <a href="mailto:jmartin@uaeh.edu.mx">jmartin@uaeh.edu.mx</a>.</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>3</sup> Departamento de Bioqu&iacute;mica; Escuela Nacional de Ciencias Biol&oacute;gicas, Instituto Polit&eacute;cnico Nacional, Carpio y Plan de Ayala s/n, Casco de Santo Tom&aacute;s, M&eacute;xico D.F. 11340, M&eacute;xico. Phone: +52 555 729 6000 (62323).</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>4</sup>Departamento de Virolog&iacute;a, Escuela Nacional de Ciencias Biol&oacute;gicas, Instituto Polit&eacute;cnico Nacional, Carpio y Plan de Ayala s/n, Casco de Santo Tom&aacute;s, M&eacute;xico D.F. 11340, M&eacute;xico. Phone: +52 555 729 6000 (62323).<sup>*</sup>Responsible author:</i> <a href="mailto:joseluismu&#241;ozsanchez@gmail.com">joseluismu&ntilde;ozsanchez@gmail.com</a></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido el 17 de noviembre de 2007    <br>   Aceptado el 6 de marzo de 2008</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">Radical scavenging assay&#150;guided fractionation of the antioxidant EtOAc and MeOH extracts from the aerial parts of <i>Geranium bellum </i>resulted in the isolation of &#946;&#150;sitosterol 3&#150;<i>O</i>&#150;&#946;&#150;D&#150;glucopiranoside <b>(1), </b>quercetin 3&#150;O&#150;&#945;&#150;L&#150;(2"&#150;O&#150;acetyl)arabinofuranoside <b>(2), </b>quercetin 3&#150;O&#150;&#945;&#150;L&#150;arabinofuranoside <b>(3), </b>quercetin <b>(4), </b>methyl gallate <b>(5), </b>gallic acid <b>(6), </b>methyl brevifolin carboxylate <b>(7), </b>and dehydrochebulic acid trimethyl ester <b>(8). </b>These substances were fully characterized by 1D and 2D NMR spectroscopy as well as by their physical properties. 2,2'&#150;Azino&#150;bis(3&#150;ethylbenzthiazoline&#150;6&#150;sulfonic acid) (ABTS) radical scavenging activities for the extracts, primary fractions and pure compounds were determined. Compounds <b>2&#150;4 </b>showed very strong ABTS radical scavenging activity, whereas compound <b>5&#150;8 </b>had moderate activity and compound <b>1 </b>was weakly active. Compounds <b>2, 7 </b>and <b>8 </b>are isolated for the first time from <i>Geranium.</i></font></p>     <p align="justify"><font face="verdana" size="2"><b>Key words: </b><i>Geranium bellum </i>Rose, Geraniaceae, antioxidant activity, flavonoids, tannins, <sup>1</sup>H and <sup>13</sup>C NMR spectroscopy.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     <p align="justify"><font face="verdana" size="2">La separaci&oacute;n dirigida mediante captura de radicales libres de los extractos antioxidantes de AcOEt y MeOH de las partes a&eacute;reas de <i>Geranium bellum </i>condujo al aislamiento de 3&#150;O&#150;&#946;&#150;D&#150;glucopiran&oacute;sido de &#946;&#150;sitosterol <b>(1), </b>3&#150;<i>O</i>&#150;&#945;&#150;L&#150;(2"&#150;O&#150;acetil)arabinofuran&oacute;sido de quercetina <b>(2), </b>3&#150;O&#150;&#945;&#150;L&#150;arabinofuran&oacute;sido de quercetina <b>(3), </b>quercetina <b>(4), </b>galato de metilo <b>(5), </b>&aacute;cido g&aacute;lico <b>(6), </b>brevifolin carboxilato de metilo <b>(7) </b>y el &eacute;ster trimet&iacute;lico del &aacute;cido dehidrocheb&uacute;lico <b>(8). </b>Las sustancias fueron completamente caracterizadas mediante espectroscop&iacute;a de RMN en 1D y 2D, as&iacute; como por sus propiedades f&iacute;sicas. Se determin&oacute; las capacidades de captura de radicales del &aacute;cido 2,2'&#150;azino&#150;bis(3&#150;etilbenzotiazolina&#150;6&#150;sulf&oacute;nico) (ABTS) para los extractos, fracciones primarias y compuestos puros. Los compuestos <b>2&#150;4 </b>mostraron fuerte actividad de captura de radicales, mientras que los compuestos <b>5&#150;8 </b>presentaron actividad moderada y el compuesto <b>1 </b>fue d&eacute;bilmente activo. Esta es la primera vez que los compuestos <b>2, 7 </b>y <b>8 </b>se a&iacute;slan de <i>Geranium.</i></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Palabras clave: </b><i>Geranium bellum </i>Rose, Geraniaceae, actividad antioxidante, flavonoides, taninos, espectroscop&iacute;a de RMN de <sup>1</sup>H y <sup>13</sup>C.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/jmcs/v52n2/v52n2a1.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Acknowledgments</b></font></p>     <p align="justify"><font face="verdana" size="2">Partial financial support from CONACYT, Mexico, and UAEH is acknowledged (Grants No. 37574&#150;E and PAI2006&#150; B50, respectively). Juan A. Gayosso&#150;De&#150;Lucio and Abelardo Camacho&#150;Luis thanks CONACYT for fellowships (No. 192886 and 161969, respectively). We are grateful to Professor Manuel Gonzalez Ledesma (Herbarium of Biological Research Centre, UAEH, Mineral de la Reforma, Hidalgo, Mexico) for identifying the plant material, and to Professor Joseph M. Muchowski (ROCHE, Palo Alto, California, U.S.A.) for review of this manuscript.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">1. Aedo, C.; Mu&ntilde;oz&#150;Garmendia, F.; Pando, F. <i>Anales Jard. Bot. Madrid, </i><b>1998,</b> <i>56, </i>211&#150;252.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4903608&pid=S1870-249X200800020000100001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>     ]]></body>
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