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Furthermore , melamine - induced ROS production could be attenuated by apocynin , a NOX inhibitor .
 Chemical: melamine; Chemical: apocynin
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: melamine; Chemical: apocynin