Chemical structure of <a href="https://en.wikipedia.org/wiki/Caprolactone" class="extiw" title="w:Caprolactone">Caprolactone</a>.
<a href="//commons.wikimedia.org/wiki/User:KES47" class="mw-redirect" title="User:KES47">Kes<sup>4</sup><sub>7</sub></a>
<a href="//commons.wikimedia.org/wiki/File:Caprolactone.png" title="File:Caprolactone.png">File:Caprolactone.png</a>