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N - Acetylcysteine ( NAC ) is a recognized hepatoprotective agent that has been reported to reduce hepatotoxicity initiated by many different compounds .
 Chemical: N - Acetylcysteine; 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: N - Acetylcysteine; Chemical: NAC