5382
Toxicity in keratinocyte ( HaCaT ) and fibroblast ( 3T3 ) cell lines showed IC ( 50 ) values ranging from tens to hundreds of mu M , which is comparable with standard enhancers .
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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