Ball-and-stick model of the benzenesulfonate anion, the conjugate base of <a href="https://en.wikipedia.org/wiki/Benzenesulfonic_acid" class="extiw" title="w:Benzenesulfonic acid">benzenesulfonic acid</a>.
<a href="//commons.wikimedia.org/wiki/User:Jynto" title="User:Jynto">Jynto</a> and <a href="//commons.wikimedia.org/wiki/User:Benjah-bmm27" title="User:Benjah-bmm27">Ben Mills</a>
Derived from <a href="//commons.wikimedia.org/wiki/File:Pyrocatechol-3D-balls.png" title="File:Pyrocatechol-3D-balls.png">File:Pyrocatechol-3D-balls.png</a> and <a href="//commons.wikimedia.org/wiki/File:Sulfamic-acid-zwitterion-3D-balls.png" title="File:Sulfamic-acid-zwitterion-3D-balls.png">File:Sulfamic-acid-zwitterion-3D-balls.png</a>.