23257
In the present study , the cytotoxic effects of a non - modified clay ( Cloisite (R) Na + ) and an organoclay ( Cloisite (R) 30B ) have been investigated in the hepatic cell line HepG2 .
 Chemical: Cloisite; Chemical: Na +; Chemical: Cloisite
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Cloisite; Chemical: Na +; Chemical: Cloisite