<a href="https://en.wikipedia.org/wiki/Skeletal_formula" class="extiw" title="w:Skeletal formula">Skeletal formula</a> of <a href="https://en.wikipedia.org/wiki/bencyclane" class="extiw" title="w:bencyclane">bencyclane</a>—a <a href="https://en.wikipedia.org/wiki/calcium_channel" class="extiw" title="w:calcium channel">calcium channel</a> blocker. Created using <a rel="nofollow" class="external text" href="http://www.chemdoodle.com">ChemDoodle</a> 7.0.2, <a rel="nofollow" class="external text" href="http://www.adobe.com/products/illustrator.html">Adobe Illustrator CC</a>.
<a href="//commons.wikimedia.org/wiki/User:Doxepine" title="User:Doxepine">Doxepine</a>
Own work  using: <a rel="nofollow" class="external free" href="https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2312&amp;loc=ec_rcs">https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2312&amp;loc=ec_rcs</a>