skeletal formula of <a href="https://en.wikipedia.org/wiki/en:norbornane" class="extiw" title="w:en:norbornane">norbornane</a>
<a href="//commons.wikimedia.org/wiki/User:WhiteTimberwolf" title="User:WhiteTimberwolf">WhiteTimberwolf</a>, <a href="//commons.wikimedia.org/wiki/User:Benjah-bmm27" title="User:Benjah-bmm27">Ben Mills</a> (PNG version)
<span class="int-own-work" lang="en">Own work</span>