<?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%">Marian Nabil</style></author><author><style face="normal" font="default" size="100%">Neveen S Ghaly</style></author><author><style face="normal" font="default" size="100%">Iman AA Kassem</style></author><author><style face="normal" font="default" size="100%">Mary H Grace</style></author><author><style face="normal" font="default" size="100%">Farouk R Melek</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Two Triterpenoid Saponins with alpha-glucosidase Inhibitory Activity from Harpullia pendula Seed Extract</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%">Harpullia pendula</style></keyword><keyword><style  face="normal" font="default" size="100%">Sapindaceae</style></keyword><keyword><style  face="normal" font="default" size="100%">Triterpenoid saponins</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2019</style></year><pub-dates><date><style  face="normal" font="default" size="100%">November 2019</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">11</style></volume><pages><style face="normal" font="default" size="100%">1386-1390</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;Background: &lt;/strong&gt;&lt;em&gt;Harpullia pendula &lt;/em&gt;Planch (family Sapindaceae) is a small to medium rainforest tree native to Australia. &lt;strong&gt;Objective: &lt;/strong&gt;This study aims to isolate triterpenoid saponins from &lt;em&gt;H. pendula &lt;/em&gt;and test them as α-glucosidase inhibitors. &lt;strong&gt;Materials and Methods: &lt;/strong&gt;The saponin compounds were obtained using variable chromatographic techniques and characterized by spectral analysis. &lt;strong&gt;Results:&lt;/strong&gt; Two new triterpenoid saponins were obtained as an inseparable mixture from &lt;em&gt;H. pendula&lt;/em&gt; methanolic seed extract. Their structures were determined as 3-O-β-D-glucopyranosyl-(1→2)-[α-L-arabinofuranosyl-(1→3)]-βD-glucuronopyranosyl22-OangeloylA1- barrigenol and 3-O-β-D-galactopyranosyl-(1→2)-[α-L-arabinofuranosyl-(1→3)]-β-Dglucuronopyranosyl 22-O-(2-methylbutyroyl)-A1 barrigenol, respectively. The triterpene part 22-O-(2-methyl butyroyl) A1-barrigenol has never been characterized before. The α- glucosidase inhibitory activity of the two saponin mixture was evaluated &lt;em&gt;invitro&lt;/em&gt; and proved to exhibit strong activity with IC&lt;sub&gt;50&lt;/sub&gt; value equals to 13.3 ± 5.0 ppm and IC&lt;sub&gt;90 &lt;/sub&gt;value equals to 21.5 ± 8.0 ppm. &lt;strong&gt;Conclusion: &lt;/strong&gt;Two new saponins were characterized from their mixture and found to exhibit α-glucosidase inhibitory activity.&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%">Original Article</style></work-type><section><style face="normal" font="default" size="100%">1386</style></section><auth-address><style face="normal" font="default" size="100%">&lt;p class=&quot;rtejustify&quot;&gt;&lt;strong&gt;Marian Nabil, Neveen S. Ghaly, Iman A.A. Kassem, Mary H. Grace and Farouk R. Melek* &lt;/strong&gt;&lt;/p&gt;

&lt;p class=&quot;rtejustify&quot;&gt;Chemistry of Natural Compounds Department, National Research Centre, Dokki,12622, Giza, EGYPT.&lt;/p&gt;
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