<?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%">Azlini Ismail</style></author><author><style face="normal" font="default" size="100%">Erlena Nor Asmira Abdul Rahim</style></author><author><style face="normal" font="default" size="100%">Muhammad Nor Omar</style></author><author><style face="normal" font="default" size="100%">Wan Amir Nizam Wan Ahmad</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Antihypertensive Assay-Guided Fractionation of Syzygium polyanthum Leaves and Phenolics Profile Analysis Using LCQTOF/ MS</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%">Antihypertensive</style></keyword><keyword><style  face="normal" font="default" size="100%">Bioassay-guided</style></keyword><keyword><style  face="normal" font="default" size="100%">LCMS</style></keyword><keyword><style  face="normal" font="default" size="100%">Syzygium polyanthum</style></keyword><keyword><style  face="normal" font="default" size="100%">Total phenol content (TPC)</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2020</style></year><pub-dates><date><style  face="normal" font="default" size="100%">November 2020</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">12</style></volume><pages><style face="normal" font="default" size="100%">1670-1692</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Introduction:&lt;/strong&gt; &lt;em&gt;Syzygium polyanthum&lt;/em&gt; leaves extract that contains gallic acid as the major phenolic compound has shown significant antihypertensive effect, however the amount of gallic acid was inversely-related with magnitude of this effect. This study aimed to conduct bioassay-guided fractionation of &lt;em&gt;S. polyanthum&lt;/em&gt; leaves with gallic acid as a reference compound, and to screen for other possible compounds responsible for the antihypertensive effect. &lt;strong&gt;Methods: &lt;/strong&gt;&lt;em&gt;S. polyanthum &lt;/em&gt;leaves were extracted using n-hexane, ethyl acetate, methanol, and water. The most active crude extract was fractionated using column chromatography and analyzed for total phenolic content (TPC) (n=3). Crude extracts and the derived fractions were intravenously administered into pentobarbital-anaesthetized Spontaneously Hypertensive rats (n=5) for recording of blood pressure parameters. Liquid Chromatography-Quadruple Time-Off-Flight/Mass Spectrometry was used for determination of chemical composition. One-way and two-way ANOVA were used for statistical analysis using GraphPad® PRISM Version 6. &lt;strong&gt;Results: &lt;/strong&gt;Fractionation of aqueous &lt;em&gt;S. polyanthum&lt;/em&gt; leaves extract (ASP) afforded nine fractions, later combined into three fractions (F1ASP, F2ASP, and F3ASP) based on the thinlayer chromatography profiles. ASP has the highest TPC while F2ASP has the lowest TPC. All fractions exhibited significant antihypertensive property, but F2ASP was the most active fraction. Few phenolics with related antihypertensive effects such as 1-galloyl glucose (a gallic acid-derivative majorly found in F2ASP and F3ASP), and other compounds such as polydatin, sesamol, brazilin, eugenol, ellagic acid, kukoamine A, and cyclocurcumin were found across all active fractions. &lt;strong&gt;Conclusion: &lt;/strong&gt;These phenolics may partly contribute to the antihypertensive effect of &lt;em&gt;S. polyanthum&lt;/em&gt; leaves, thus further isolation study is recommended.&lt;/p&gt;
</style></abstract><issue><style face="normal" font="default" size="100%">6s</style></issue><work-type><style face="normal" font="default" size="100%">Research Article</style></work-type><section><style face="normal" font="default" size="100%">167</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Azlini Ismail&lt;sup&gt;1,&lt;/sup&gt;*, Erlena Nor Asmira Abdul Rahim&lt;sup&gt;2&lt;/sup&gt;, Muhammad Nor Omar&lt;sup&gt;2&lt;/sup&gt;, Wan Amir Nizam Wan Ahmad&lt;sup&gt;3&lt;/sup&gt;&lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;1&lt;/sup&gt;Department of Fundamental Dental and Medical Sciences, Kuliyyah of Dentistry, International Islamic University Malaysia, Indera Mahkota, 25200 Kuantan, Pahang, MALAYSIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;2&lt;/sup&gt;Department of Biotechnology, Kuliyyah of Science, International Islamic University Malaysia, Indera Mahkota, 25200 Kuantan, Pahang, MALAYSIA.&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;&lt;sup&gt;3&lt;/sup&gt;School of Health Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, MALAYSIA.&lt;/p&gt;
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