3061
Selective pharmacological activation of the adenosine 1 receptor ( A ( 1 ) R ) is a promising new approach to achieve a potent block of atrioventricular ( A - V ) - nodal conduction without significant cardiovascular side effects .
 Chemical: adenosine
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