4106
The selective adenosine A ( 1 ) receptor antagonist prevented the electrophysiological effects of amitriptyline on atrial AP .
 Chemical: adenosine; Chemical: amitriptyline
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: adenosine; Chemical: amitriptyline