Chemical structure of theonellamide F, a bicyclic peptide isolated from the marine sponge <i>Theonella swinhoei</i>. 
<ul><li><cite style="font-style:normal">Matsunaga, S.; Fusetani, N.; Hashimoto, K.; Walchli, M. (1989). "Theonellamide F. A novel antifungal bicyclic peptide from a marine sponge <i>Theonella</i> sp". <i>J. Am. Chem. Soc.</i> <b>111</b> (7): 2582–2588. <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1021/ja00189a035">10.1021/ja00189a035</a>.</cite></li></ul>
<a href="//commons.wikimedia.org/wiki/User:Charlesy" title="User:Charlesy">Charlesy</a>
2012-09-24
<span class="int-own-work" lang="en">Own work</span>