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3 - Nitropropionic acid ( 3 - NP ) , a mitochondrial toxin , has been reported to induce an acute cochlear damage .
 Chemical: 3 - Nitropropionic acid; Chemical: 3 - NP
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: 3 - Nitropropionic acid; Chemical: 3 - NP