2959
Using paraoxon as a reference acetylcholinesterase ( AChE ) inhibitor , the objective of this study was to develop an adverse outcome pathway ( AOP ) that provided quantitative linkages across levels of biological organization during zebrafish embryogenesis .
 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: paraoxon