Structure of <a href="https://en.wikipedia.org/wiki/Butane" class="extiw" title="en:Butane">Butane</a>
<a href="//commons.wikimedia.org/wiki/User:NEUROtiker" title="User:NEUROtiker">NEUROtiker</a> <sup><a href="//commons.wikimedia.org/wiki/User_talk:NEUROtiker" title="User talk:NEUROtiker">⇌</a></sup>
2009-06-14
<span class="int-own-work" lang="en">Own work</span>