Citicoline is a single nucleotide composed of ribose, cytosine, pyrophosphate and choline, which is a water-soluble compound.

Phospholipid is a component of human cell membrane structure, which plays a crucial role in maintaining the stability of the environment in the cell membrane and maintaining the activity of cell membrane-related enzymes.

In the central nervous system, most phospholipid synthesis is regulated by the change of citicoline concentration.