2789
All compounds were evaluated for in vitro cytotoxic activity against cultured A - 549 , MCF - 7 , KB , and KBVIN cells , and 4 exhibited cytotoxicity with EC50 values of 4 . 9 , 0 . 8 , 3 . 4 , and 3 . 2 mu g / mL , respectively .
 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