Skeletal formula of <a href="https://en.wikipedia.org/wiki/pentobarbital" class="extiw" title="w:pentobarbital">pentobarbital</a> (<b>Nembutal</b>).
<a href="//commons.wikimedia.org/wiki/User_talk:Harbin" title="User talk:Harbin">Harbin</a>
2008-02-10
<span class="int-own-work" lang="en">Own work</span>