4097
We investigated the role of adenosine receptors in amitriptyline - induced cardiac action potential ( AP ) changes in isolated rat atria .
 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