18023
Further , cytotoxic activities of all the isolates were evaluated by determining their inhibitory effects against A - 549 , B - 16 , Hela , HT - 29 , NCI - H460 , PC - 3 , IEC - 6 and L - 6 cancer cell lines .
 None
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None