21215
Methods : Pellets were formulated to contain either 20 % or 40 % Avicel CL611 and lactose monohydrate as the other sole ingredient .
 lactose monohydrate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 lactose monohydrate