Perfluorocarbons are an interesting group of greenhouse gases.

....The story of perfluorocarbons (PFC) (click here) began in the middle of World War II (1). In the desert of Alamo, scientists trying to develop the hydrogen bomb needed a chemically inert molecule to manipulate highly sensitive components. They observed that substituting hydrogen atoms of carbohydrates with atoms of fluor produces electrovalent liaisons so strong that they prevent any kind of reaction with other molecules....

Perfluorocompounds go through a chemical process that removes hydrogens from carbon chains and replaces them with flourine. 

I find the use of the word carbohydrate odd. Carbohydrates have oxygen molecules. But, what this example shows are hydrocarbons otherwise known as hydrogen carbon chains.

The names of the chains are below:

The carbon chain above is propane. Three hydrogens at each end and two hydrogens in the center. The common suffix is -ane.

The word defining the number of carbons is the first part of the word.

Pentane, like pentagon, has five carbons. Octane, like octopus, has eight carbons.

Decane, like decade, has ten carbons. 

And so on and so forth.