<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Aktsar Roskiana Ahmad</style></author><author><style face="normal" font="default" size="100%">Berna Elya</style></author><author><style face="normal" font="default" size="100%">Abdul Mun’im</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antioxidant Activity and Isolation of Xanthine Oxidase Inhibitor from Ruellia tuberosa L. Leaves</style></title><secondary-title><style face="normal" font="default" size="100%">Pharmacognosy Journal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Antioxidant</style></keyword><keyword><style  face="normal" font="default" size="100%">DPPH</style></keyword><keyword><style  face="normal" font="default" size="100%">Flavonoid.</style></keyword><keyword><style  face="normal" font="default" size="100%">Ruellia Tuberosa</style></keyword><keyword><style  face="normal" font="default" size="100%">Xanthine Oxidase</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2017</style></year><pub-dates><date><style  face="normal" font="default" size="100%">July 2017</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">/files/pj-9-5/10.5530pj.2017.5.96/index.html</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">607-610</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; The leaves of &lt;em&gt;Ruellia tuberosa &lt;/em&gt;L. have been known to demonstrate strong antioxidant and xanthine oxidase (XOD) inhibitory activities. The aim of this study was to isolate antioxidant and XOD inhibitor from the leaves of the plants.&lt;strong&gt; Methods:&lt;/strong&gt; Isolation of antioxidant and XOD inhibitor were conducted using chromatography techniques. The structure of the isolated compound was elucidated by spectroscopic methods. &lt;strong&gt;Results:&lt;/strong&gt; In this study, a flavonoid was isolated and characterized as methoxylated flavonoid based on the spectral data including UV, IR, GC-MS, and NMR. The compound demonstrated DPPH free radical scavenging activity with IC&lt;sub&gt;50&lt;/sub&gt; of 28.79 &amp;mu;g/ml, and XOD inhibitory with IC&lt;sub&gt;50&lt;/sub&gt; of 0.67 &amp;mu;g/mL. &lt;strong&gt;Conclusion:&lt;/strong&gt; The isolated compound was determined as 5-hydroxy-3,7-dimethoxy-2-(4-((3S,4S,5S,6R)-4,5, 6-trihydroxy-2(hydroxymethoxy)-tetrahydro-2H-pyrane-3-iloxy) phenyl)-4H-chromen-4-on or camarosids. The isolated compound demonstrated strong DPPH free radical scavenging and XOD inhibitory activity.&amp;nbsp;&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">607</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Aktsar Roskiana Ahmad&lt;sup&gt;1,2&lt;/sup&gt;, Berna Elya&lt;sup&gt;1&lt;/sup&gt;, Abdul Mun&amp;rsquo;im&lt;sup&gt;1* &lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Pharmacognosy- Phytochemistry, Faculty of Pharmacy, Universitas Indonesia, Kampus UI Depok 16424 West Java, INDONESIA&lt;/p&gt;
&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Faculty of Pharmacy, Indonesia Muslim University, Makassar, INDONESIA&lt;/p&gt;</style></auth-address></record></records></xml>