Pentacosanic acid С<sub>24</sub>Н<sub>49</sub>СООН
<a href="//commons.wikimedia.org/wiki/User:Vadim_Akopyan" title="User:Vadim Akopyan">Vadim Akopyan</a>
2011-05-21
<span class="int-own-work" lang="en">Own work</span>