<?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%">Pathrapa Rungwichaniwat</style></author><author><style face="normal" font="default" size="100%">Boonchoo Sritularak</style></author><author><style face="normal" font="default" size="100%">Kittisak Likhitwitayawuid</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Chemical Constituents of Dendrobium williamsonii</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%">Anti-herpetic Cytotoxicity</style></keyword><keyword><style  face="normal" font="default" size="100%">Dendrobium williamsonii</style></keyword><keyword><style  face="normal" font="default" size="100%">Free Radical Scavenging Activity</style></keyword><keyword><style  face="normal" font="default" size="100%">Orchidaceae</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2014</style></year><pub-dates><date><style  face="normal" font="default" size="100%">8th April 2014</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">6</style></volume><pages><style face="normal" font="default" size="100%">36-41</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;Objective:&lt;/strong&gt; Isolation of compounds from &lt;em&gt;Dendrobium williamsonii&lt;/em&gt; and evaluation of each isolates for its free radical scavenging, antiherpetic and cytotoxic activities. &lt;strong&gt;Results: &lt;/strong&gt;Six phenolic compounds were isolated including tetratriacontanyltrans- p-coumarate (1), &lt;em&gt;trans&lt;/em&gt;-docosanoylferulate (2), 3,3&amp;prime;-dihydroxy-4,5-dimethoxybibenzyl (3), moscatilin (4), apigenin (5) and vanillic acid (6). Among these isolates, compounds 3, 4 and 5 exhibited recognizable DPPH free radical scavenging potential.Only 3 exhibited weak activity against &lt;em&gt;Herpes simplex&lt;/em&gt; virus, whereas 3 and 4 showed cytotoxicity against KB and MCF-7 cancer cells. &lt;strong&gt;Conclusion:&lt;/strong&gt; This study is the first report on the chemical and biological properties of&lt;em&gt; D. williamsonii&lt;/em&gt;.Compounds 3, 4 and 5 are responsible for free radical scavenging activity of this plant. Compound 4 showed the strongest cytotoxic effect on KB cancer cells.&lt;/p&gt;&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Key words:&lt;/strong&gt;&lt;em&gt;Dendrobium williamsonii&lt;/em&gt;, Orchidaceae, Anti-herpetic Cytotoxicity, Free radical scavenging activity.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><work-type><style face="normal" font="default" size="100%">Original Article</style></work-type><auth-address><style face="normal" font="default" size="100%">&lt;p style=&quot;text-align: justify;&quot;&gt;&lt;strong&gt;Pathrapa Rungwichaniwat, Boonchoo Sritularak&lt;sup&gt;* &lt;/sup&gt;and Kittisak Likhitwitayawuid&lt;/strong&gt;&lt;/p&gt;&lt;p style=&quot;text-align: justify;&quot;&gt;Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand.&lt;/p&gt;</style></auth-address></record></records></xml>