<a href="https://en.wikipedia.org/wiki/beta-carotene" class="extiw" title="w:beta-carotene">beta-carotene</a> with conjugation highlighted in red.
<a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Rubber Duck</a> <small>(<a href="//commons.wikimedia.org/wiki/User_talk:Krishnavedala" title="User talk:Krishnavedala">☮</a> • <a href="//commons.wikimedia.org/wiki/Special:Contributions/Krishnavedala" title="Special:Contributions/Krishnavedala">✍</a>)</small>
<span class="int-own-work" lang="en">Own work</span>