Chemical structure of <a href="https://en.wikipedia.org/wiki/Boron_porphyrins:johbrbr" class="extiw" title="en:Boron porphyrins:johbrbr">Boron porphyrins:johbrbr</a>
<a href="//commons.wikimedia.org/w/index.php?title=User:Johbrbr&amp;action=edit&amp;redlink=1" class="new" title="User:Johbrbr (page does not exist)">Johbrbr</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Johbrbr" title="User talk:Johbrbr"><span class="signature-talk">talk</span></a>)
<span class="int-own-work" lang="en">Own work</span>