24046
In addition , compound 6 and 7 displayed potent anti - H1N1 activity with IC50 value of 28 . 9 +/- 2 . 2 and 6 . 8 +/- 1 . 5 mu M , respectively .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None