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In BH4 deficiency , oxygen reduction uncouples from NO synthesis , thereby converting eNOS to a superoxide - producing enzyme .
 Chemical: BH4; Chemical: oxygen; Chemical: NO; Chemical: superoxide
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: BH4; Chemical: oxygen; Chemical: NO; Chemical: superoxide