531
These results suggest the involvement of both adenosine receptors in the action of cocaine although agonists of A1 receptors seem to have stronger influence on it .
 Chemical: adenosine; Chemical: cocaine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: adenosine; Chemical: cocaine