14949
EXPERT OPINION : Both NA enzyme inhibition and X - ray crystallography data have suggested that the strategy of designing NAIs binding to the highly conserved region of NA can lead to inhibitors that are effective against all influenza NA subtypes .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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