7-aminocephalosporanic acid; 7-ACA; Prestwick_714; 7-Aminocephalosporinic acid
<a href="//commons.wikimedia.org/wiki/User:Yikrazuul" title="User:Yikrazuul">Yikrazuul</a>
2009-07-20
<span class="int-own-work" lang="en">Own work</span>