Chemical structure of di-p-xylylene
<a href="//commons.wikimedia.org/w/index.php?title=User:Saiph&amp;action=edit&amp;redlink=1" class="new" title="User:Saiph (page does not exist)">Saiph</a>
2008-11-03
<span class="int-own-work" lang="en">Own work</span>