14875
Ara - C has a number of limitations such as a rapid deactivation by cytidine deaminase leading to the formation of a biologically inactive metabolite , Ara - U ( 1 beta - d - arabinofuranosyluracil ) , a low lipophilicity , and fast clearance from the body .
 Ara - C, cytidine, Ara - U, 1 beta - d - arabinofuranosyluracil
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ara - C, cytidine, Ara - U, 1 beta - d - arabinofuranosyluracil