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In a neuronal cell line , we found that selective CB ( 2 ) receptor agonists upregulate beta - Arrestin 2 , an effect that was prevented by selective CB ( 2 ) receptor antagonist JTE - 907 and CB ( 2 ) shRNA lentiviral particles .
 Chemical: JTE - 907
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: JTE - 907