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Cobalt chloride , a typical HIF activator , induced the gene expression of CAR - target genes , including cyp2b9 and cyp2b10 , an accumulation of nuclear CAR and an increase in the PB - responsive enhancer module - mediated transactivation in the mouse liver .
 Cobalt chloride
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Cobalt chloride