20466
The most potent derivative of this series inhibits TMPRSS2 with a Ki value of 0 . 9 nM and showed an efficient blockage of influenza virus propagation in human airway epithelial cells .
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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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