Simple Enough

https://commons.wikimedia.org/wiki/File:Churchane-2D-skeletal-bold.png

These compounds are named housane, churchane, basketane, and penguinone.

Below: To celebrate the 2012 London Olympics, chemists Graham Richards and Antony Williams offered a molecule of five rings. They called it olympicene.

https://commons.wikimedia.org/wiki/File:Olympicene.svg