4322
In addition , NIK - 247 and tacrine , but not E - 2020 , strongly inhibited butyrylcholinestrase ( BuChE ) in human serum .
 Chemical: NIK - 247; Chemical: tacrine; Chemical: E - 2020
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: NIK - 247; Chemical: tacrine; Chemical: E - 2020