<a href="https://en.wikipedia.org/wiki/Bis(pinacolato)diboron" class="extiw" title="en:Bis(pinacolato)diboron">Bis(pinacolato)diboron</a>
<a href="//commons.wikimedia.org/wiki/User:Rifleman_82" title="User:Rifleman 82">Rifleman 82</a>
<span class="int-own-work" lang="en">Own work</span>