Drawing Fused RIngs

In this example, you will create a fused ring system cyclopentanoperhydrophenanthrene.  

The cyclopentanoperhydrophenanthrene ring system is the backbone of many important biological molecules, like steroids and cholesterol. It provides a rigid, stable framework that forms the core of these compounds. This core structure allows for various chemical groups to attach in different places, giving rise to a wide variety of molecules with different functions. For example, cholesterol has this core structure, and it helps maintain the fluidity of cell membranes. Steroid hormones like testosterone and estrogen also share this backbone but have different groups attached, making them act as powerful signaling molecules in the body.

Action

Create a cyclohexane (hexagon) ring by using the "Ring Tool" .  With the ring tool active click on the bond on the right side of the cycloheane ring.  The do it again, being carerful of where the ring fuses o the existing ring.  Change the ring tool to cyclopentane (pentagon) and fuse in the appropriate position.  Draw cyclohexane below.  See if you can do it manually, bond by bond!