chemical structure of semicarbazide
<a href="//commons.wikimedia.org/wiki/User:Edgar181" title="User:Edgar181">Edgar181</a>
<a href="//commons.wikimedia.org/wiki/User:Edgar181" title="User:Edgar181">Edgar181</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Edgar181" title="User talk:Edgar181"><span class="signature-talk">talk</span></a>) 13:41, 24 May 2010 (UTC)
<span class="int-own-work" lang="en">Own work</span>