Fats Lipids Cholesterol 

The molecules described here are in the Moilin Library.
Fats or Lipids are water insoluble subatances that can be extracted from cells using nonpolar organic solvents. They have a relatively large nonpolar hydrocarbon part and a small oxygen containing polar part. Stearic acid has a 17 atom hydrocarbon chain and a carboxylic acid group.
Its chemical formula is CH3(CH2)16COOH and it is a saturated fat.

Linoleic acid has two double bonds, can be hydrogenated and is a poly unsaturated fat. Its formula is CH3(CH2)4CH=CH2CH=CH(CH2)7COOH

Three stearic acid molecules can form a triester with glycerol, HO-CH2(CH-OH)CH2-OH, called a triglyceride.

Cholesterol is another well known fat. It is a stearoid and has a structure based on fused rings.