19771
The beta - fluoroethoxy methylphosphonate analog ( R = Me , Z = F , n = 2 ) was the most potent anti - AChE compound comparable ( ki ~ 6 x 10 ( 6 ) M ( - 1 ) min ( - 1 ) ) to paraoxon against EEAChE .
 Chemical: beta - fluoroethoxy methylphosphonate; Chemical: R = Me , Z = F , n = 2; Chemical: paraoxon
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: beta - fluoroethoxy methylphosphonate; Chemical: R = Me , Z = F , n = 2; Chemical: paraoxon