What is the name of the hexagonal diagram used to represent molecular structures?

https://upload.wikimedia.org/wikipedia/commons/b/be/PF-219%2C061_molecular_structure.png

This is the format that I'm talking about. I'm looking to understand more about molecular structures and find out what sort of appearance different biological chemicals would look like in this particular format.

Question

What is the name of the hexagonal diagram used to represent molecular structures? 

https://upload.wikimedia.org/wikipedia/commons/b/be/PF-219%2C061_molecular_structure.png

This is the format that I'm talking about. I'm looking to understand more about molecular structures and find out what sort of appearance different biological chemicals would look like in this particular format.

matt6288 · Answer

skeleton formulas Reference https://www.physicsforums.com/threads/what-do-the-hexagonal-shapes-mean-in-chemistry.486843/