Chemical diagram showing two methods of numbering carbon atoms in cannabidiol
<a href="//commons.wikimedia.org/wiki/User:Innerstream" title="User:Innerstream">User:Innerstream</a>
<span class="int-own-work" lang="en">Own work</span>, based off of <a href="//commons.wikimedia.org/wiki/File:Cannabidiol_numbering.png" title="File:Cannabidiol numbering.png">File:Cannabidiol numbering.png</a>