Biosynthesis of camphor.
<a href="//commons.wikimedia.org/wiki/User:Hbf878" title="User:Hbf878">Hbf878</a>
<span class="int-own-work" lang="en">Own work</span> according to <a href="//commons.wikimedia.org/wiki/File:CamphorBiosynthesis.png" title="File:CamphorBiosynthesis.png">File:CamphorBiosynthesis.png</a> uploaded by user Walkerma