title: RegEx pattern with not followed by
body: <p>I want to match only first file path, which not contains word Thumbnails. I use "not-followed by pattern" but it doesn`t work. Could some one take a look and tell me where is my mistake? Here is my regex:</p>
  
  <pre><code>&lt;string&gt;((.*(?!Thumbnails))\.jpg)&lt;/string&gt;
  </code></pre>
  
  <p>Strings</p>
  
  <pre><code>&lt;string&gt;/Volumes/Macintosh HD/Users/username/Pictures/iPhoto Library/Masters/2012/05/14/20120514-105314/IMG_6204.JPG&lt;/string&gt;
  &lt;string&gt;/Volumes/Macintosh HD/Users/username/Pictures/iPhoto Library/Thumbnails/2012/05/14/20120514-105314/IMG_6204.jpg&lt;/string&gt;
  </code></pre>