Structure of Thiepan. Created with BKchem and slightly modified in Inkscape.
Me, Stanislaw Gackowski (<a href="//commons.wikimedia.org/w/index.php?title=User:Soeb&amp;action=edit&amp;redlink=1" class="new" title="User:Soeb (page does not exist)">Soeb</a>)
<span class="int-own-work" lang="en">Own work</span>