Piperidin-2-yl(thiophen-2-yl)methanone or Cyclo-Methiodrone (TCAT), an empathogen exogenous neurologically active molecule.
<a href="//commons.wikimedia.org/wiki/User:Krishnavedala" title="User:Krishnavedala">Krishnavedala</a>
<span class="int-own-work" lang="en">Own work</span>