Chemical structure of β-carotene.
<a href="//commons.wikimedia.org/wiki/User:KES47" class="mw-redirect" title="User:KES47">KES47</a>
<a href="//commons.wikimedia.org/wiki/File:Beta-carotene.png" title="File:Beta-carotene.png">File:Beta-carotene.png</a>