Skeletal formula of <a href="https://en.wikipedia.org/wiki/barusiban" class="extiw" title="w:barusiban">barusiban</a> (codenamed <b>FE-200,440</b>) — an <a href="https://en.wikipedia.org/wiki/oxytocin_receptor" class="extiw" title="w:oxytocin receptor">oxytocin receptor</a> antagonist. Created with <a rel="nofollow" class="external text" href="http://www.chemdoodle.com">ChemDoodle 8.1.0</a> and <a rel="nofollow" class="external text" href="http://www.adobe.com/products/illustrator.html">Adobe Illustrator CC 2015</a>.
<a href="//commons.wikimedia.org/wiki/User:Vaccinationist" title="User:Vaccinationist">Vaccinationist</a>
Own work  using: <a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/9832431">PubChem</a>