Chemical structure of <a href="https://en.wikipedia.org/wiki/HU-320" class="extiw" title="w:HU-320">HU-320</a>
<a href="//commons.wikimedia.org/wiki/User:Anypodetos" title="User:Anypodetos">Anypodetos</a>
2011-12-10
<span class="int-own-work" lang="en">Own work</span>