Great Doodle Challenge: Doodle #2

 oceanotter cameos into my doodle to inform me that nobody cares if the cis isomer of the depicted hydrocarbon compound looks vaguely like a castle or fortress. As well as to insult my ability (or lack thereof) to draw otters.

Bonus points and maybe gift art (though coming from me it's like negative gift art) to the first fur who can correctly name the hydrocarbon compound I drew. :D