20446
These anti - viral compounds were employed to identify the target as Niemann - Pick C1 ( NPC1 ) , a host protein that binds the EboV glycoprotein and is essential for infection .
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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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