5712
Sprague - Dawley rats treated with a non - selective cannabinoid agonist ( CP55940 , 50 mu g / kg , 7 days , i . p . ) showed enhanced co - immunoprecipitation of beta - Arrestin 2 and ERK1 / 2 , enhanced pERK protein levels , and enhanced expression of beta - Arrestin 2 mRNA and protein levels in PFCx .
 Chemical: CP55940
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: CP55940