chemical structure of <a href="https://en.wikipedia.org/wiki/Phenazone" class="extiw" title="en:Phenazone">Phenazone</a>
<a href="//commons.wikimedia.org/wiki/User:Rhododendronbusch" title="User:Rhododendronbusch">Rhododendronbusch</a>
2006-10-12
<span class="int-own-work" lang="en">Own work</span>