2D structure of a sedative-hypnotic drug <a href="https://en.wikipedia.org/wiki/cloroqualone" class="extiw" title="w:cloroqualone">cloroqualone</a>.
<a href="//commons.wikimedia.org/wiki/User:Vaccinationist" title="User:Vaccinationist">Vaccinationist</a>
Own work  using: <a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/63338">Cloroqualone on PubChem</a>