Derivatives of saxitoxin
<br><small>Drawn after <i><a rel="nofollow" class="external text" href="https://books.google.ch/books?id=Fd1D2ZC0R3UC&amp;pg=PA50">Determination and Significance of Emerging Algal Toxins (Cyanotoxins)</a></i></small>
<a href="//commons.wikimedia.org/wiki/User:Leyo" title="User:Leyo">Leyo</a>
2009-08
<span class="int-own-work" lang="en">Own work</span>