21091
A number of compounds exhibited GI50 of 10 - 100 nM in human HCT116 , NCI - H460 and U251 cancer cells , in vitro .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None