22109
All of these synthetic compounds showed high acetylcholinesterase ( AChE ) inhibitory activity with IC50 values ranged from 0 . 60 to 196 . 7 nM , and good selectivity for AChE over butyrylcholinesterase ( BuChE ) ( 125 - to 3225 - fold ) .
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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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