20073
All of them were screened on cytotoxicity against KB , SGC - 7901 , SW1116 , and A549 cell lines ; compounds 4 , 9 - 11 exhibited moderate activities with IC50 values ranging from 6 . 74 to 46 . 64 micro M .
 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