cytidine diphosphocholine

cyt·i·dine di·phos·pho·cho·line (CDP-cho·line),

(sī'ti-dēn-dī-fos'fō-kō'lēn),
An intermediate in the formation of phosphatidylcholine (lecithin) and sphingomyelins; formed by the action of cytidine 5'-triphosphate on phosphocholine, linking the choline phosphate group to the α-phosphate of the cytidine 5'-triphosphate to give a pyrophosphate.