Skeletal formula of <a href="https://en.wikipedia.org/wiki/amantadine" class="extiw" title="w:amantadine">amantadine</a> — an <a href="https://en.wikipedia.org/wiki/Antiviral_drug" class="extiw" title="w:Antiviral drug">antiviral</a> and <a href="https://en.wikipedia.org/wiki/Antiparkinson" class="extiw" title="w:Antiparkinson">antiparkinsonian</a> medication.
<a href="//commons.wikimedia.org/wiki/User:Ayacop" title="User:Ayacop">Ayacop</a>
Own work  using: <a rel="nofollow" class="external text" href="https://pubchem.ncbi.nlm.nih.gov/compound/2130">PubChem</a>