29855
Blockade of A2A adenosine receptors ( A2AARs ) and inhibition of monoamine oxidase B ( MAO - B ) in brain are considered attractive strategies for the treatment of neurodegenerative diseases such as Parkinson ' s disease ( PD ) .
 adenosine, monoamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 adenosine, monoamine