Guanina
<a href="//commons.wikimedia.org/wiki/User:Deneapol" title="User:Deneapol">Deneapol</a>
2013-05-18 21:39:12
<a href="//commons.wikimedia.org/wiki/File:Guanina.png" class="image"><img alt="Guanina.png" src="https://upload.wikimedia.org/wikipedia/commons/d/df/Guanina.png" decoding="async" width="756" height="756" data-file-width="756" data-file-height="756"></a>