19623
Its production involves the transfer of phosphocholine from phosphatidylcholine onto ceramide , a reaction catalyzed by SM synthase in the Golgi lumen .
 Chemical: phosphocholine; Chemical: phosphatidylcholine; Chemical: ceramide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: phosphocholine; Chemical: phosphatidylcholine; Chemical: ceramide