<?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>S1870-249X2007000400005</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Coumarin Derivatives from Loeselia mexicana: Determination of the Anxiolytic Effect of Daphnoretin on Elevated Plus-maze]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-García]]></surname>
<given-names><![CDATA[Víctor M.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera-Ruiz]]></surname>
<given-names><![CDATA[Maribel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zepeda]]></surname>
<given-names><![CDATA[L. Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Centro de Investigación Biomédica del Sur Laboratorio de Microbiología y Farmacología]]></institution>
<addr-line><![CDATA[Xochitepec Morelos]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Nacional de Ciencias Biológicas Departamento de Química Orgánica]]></institution>
<addr-line><![CDATA[México Distrito Federal]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2007</year>
</pub-date>
<volume>51</volume>
<numero>4</numero>
<fpage>193</fpage>
<lpage>197</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2007000400005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2007000400005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2007000400005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[The bis-coumarin daphnoretin (1) and its monomelic precursors scopoletin (3) and umbelliferone (4) were isolated for the first time from L. mexicana, a vegetal species used in Mexican traditional medicine. The unambiguous 13C NMR chemical shifts assignments of daphnoretin (1) and its acetyl derivative 2 were achieved through one-bond (gHMQC) and long-distance (gHMBC) heteronuclear correlations. The crude hydroalcoholic extract and pure daphnoretin 1 obtained from this plant, showed anxiolytic effect in male ICR mice exposed to elevated plus-maze. Different doses of daphnoretin (1) were not able to modify the spontaneous locomotor activity measured in the open field test. This is the first report regarding to the anxio-lytic effect of daphnoretin (1).]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[La bis-coumarina dafnoretina (1) y sus precursores monoméricos escopoletina (3) y umbelliferona (4) se aislaron por vez primera de la parte aérea de L. mexicana Brand, una especie vegetal usada en la medicina tradicional mexicana. Los desplazamientos químicos de RMN 13C de dafnoretina (1) y su derivado acetilado 2 se establecieron de manera inequívoca mediante experimentos de correlación heteronuclear (gHMQC y gHMBC). El extracto etanólico crudo y la dafnoretina (1) pura obtenidos de esta planta mostraron efecto ansi-olítico en ratones machos ICR sometidos al experimento de laberinto elevado en forma de cruz. Los diferentes tramientos de dafnoretina (1) no modificaron la actividad motora espontánea medida con el método de campo abierto. Este es el primer estudio que describe el efecto ansiolítico de la dafnoretina (1).]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Loeselia mexicana Brand]]></kwd>
<kwd lng="en"><![CDATA[daphnoretin]]></kwd>
<kwd lng="en"><![CDATA[7-acetyldaphnoretin]]></kwd>
<kwd lng="en"><![CDATA[13C NMR chemical shift]]></kwd>
<kwd lng="en"><![CDATA[elevated plus maze]]></kwd>
<kwd lng="en"><![CDATA[anxiety]]></kwd>
<kwd lng="es"><![CDATA[Loeselia mexicana]]></kwd>
<kwd lng="es"><![CDATA[dafnoretina]]></kwd>
<kwd lng="es"><![CDATA[7-acetildafnoretina]]></kwd>
<kwd lng="es"><![CDATA[RMN 13C]]></kwd>
<kwd lng="es"><![CDATA[laberinto elevado en forma de cruz]]></kwd>
<kwd lng="es"><![CDATA[ansiedad]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Article</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Coumarin Derivatives from <i>Loeselia mexicana.</i> Determination of the Anxiolytic Effect of Daphnoretin on Elevated Plus&#45;maze</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>V&iacute;ctor M. Navarro&#45;Garc&iacute;a,<sup>1,2</sup>* Maribel Herrera&#45;Ruiz,<sup>1</sup> Gabriela Rojas,<sup>1</sup> L. Gerardo Zepeda<sup>1</sup>*</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><sup>1</sup>&nbsp;<i>Laboratorio de Microbiolog&iacute;a y Farmacolog&iacute;a, Centro de Investigaci&oacute;n Biom&eacute;dica del Sur, Instituto Mexicano del Seguro Social, Argentina 1, Xochitepec, Morelos, 62790 M&eacute;xico.</i></font></p>  	    <p align="justify"><font face="verdana" size="2"><sup>2</sup>&nbsp;<i>Departamento de Qu&iacute;mica Org&aacute;nica, Escuela Nacional de Ciencias Biol&oacute;gicas, Instituto Polit&eacute;cnico Nacional, Prol. de Carpio y Plan de Ayala, M&eacute;xico, D.F., 11340 Mexico.</i> <a href="mailto:victor.navarrog@imss.gob.mx">victor.navarrog@imss.gob.mx</a>, <a href="mailto:lzepeda@woodward.encb.ipn.mx">lzepeda@woodward.encb.ipn.mx</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Recibido el 9 de agosto de 2007    <br> 	Aceptado el 20 de octubre de 2007</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">The <i>bis</i>&#45;coumarin daphnoretin (<b>1</b>) and its monomelic precursors scopoletin (<b>3</b>) and umbelliferone (<b>4</b>) were isolated for the first time from <i>L. mexicana,</i> a vegetal species used in Mexican traditional medicine. The unambiguous <sup>13</sup>C NMR chemical shifts assignments of daphnoretin (<b>1</b>) and its acetyl derivative <b>2</b> were achieved through one&#45;bond (gHMQC) and long&#45;distance (gHMBC) heteronuclear correlations. The crude hydroalcoholic extract and pure daphnoretin <b>1</b> obtained from this plant, showed anxiolytic effect in male ICR mice exposed to elevated plus&#45;maze. Different doses of daphnoretin (<b>1</b>) were not able to modify the spontaneous locomotor activity measured in the open field test. This is the first report regarding to the anxio&#45;lytic effect of daphnoretin <b>(1</b>).</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> <i>Loeselia mexicana</i> Brand, daphnoretin, 7&#45;acetyldaphnoretin, <sup>13</sup>C NMR chemical shift, elevated plus maze, anxiety.</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 <i>bis</i>&#45;coumarina dafnoretina (<b>1</b>) y sus precursores monom&eacute;ricos escopoletina (<b>3</b>) y umbelliferona (<b>4</b>) se aislaron por vez primera de la parte a&eacute;rea de <i>L. mexicana</i> Brand, una especie vegetal usada en la medicina tradicional mexicana. Los desplazamientos qu&iacute;micos de RMN <sup>13</sup>C de dafnoretina (<b>1</b>) y su derivado acetilado <b>2</b> se establecieron de manera inequ&iacute;voca mediante experimentos de correlaci&oacute;n heteronuclear (gHMQC y gHMBC). El extracto etan&oacute;lico crudo y la dafnoretina (<b>1</b>) pura obtenidos de esta planta mostraron efecto ansi&#45;ol&iacute;tico en ratones machos ICR sometidos al experimento de laberinto elevado en forma de cruz. Los diferentes tramientos de dafnoretina (<b>1</b>) no modificaron la actividad motora espont&aacute;nea medida con el m&eacute;todo de campo abierto. Este es el primer estudio que describe el efecto ansiol&iacute;tico de la dafnoretina (<b>1</b>).</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> <i>Loeselia mexicana;</i> dafnoretina, 7&#45;acetildafnoretina, RMN <sup>13</sup>C, laberinto elevado en forma de cruz, ansiedad.</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><a href="/pdf/jmcs/v51n4/v51n4a5.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>Acknowledgements</b></font></p>  	    <p align="justify"><font face="verdana" size="2">LGZ acknowledges CGPI/IPN (grants 20020683, 20030702 and 20040199) for financial support. VMNG thanks CONACyT&#45;Mexico (52646) and IMSS&#45;FOFOI (2005/1/I/066) for financial support.</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.&nbsp;Vargas, S. R.; Zavala, S. M.; P&eacute;rez, G. C.; P&eacute;rez, G. S. <i>Phytother. 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