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None of the three test compounds induced ROS generation , yet exposure to any of the three compounds produced mitochondrial hyperpolarization , which was countered by NAC pretreatment .
 Chemical: NAC
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: NAC