<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/pentalene" class="extiw" title="w:pentalene">pentalene</a>.
<a href="//commons.wikimedia.org/w/index.php?title=User:Isilanes&amp;action=edit&amp;redlink=1" class="new" title="User:Isilanes (page does not exist)">isilanes</a>
2007-06-09
Made by myself with the <a href="https://en.wikipedia.org/wiki/free_software" class="extiw" title="w:free software">free software</a> program <a href="https://en.wikipedia.org/wiki/ChemTool" class="extiw" title="w:ChemTool">ChemTool</a>.