displacement of specific [ 3h ] neca binding by the a2-selective agonist , 2- ( phenylamino ) adenosine , the relatively nonselective antagonist , theophylline and six a1-selective agonists , r-pia , s-pia , n6- ( cyclohexyl ) adenosine , n6- ( cyclopentyl ) adenosine , n6- ( m-aminophenyl ) adenosine and n6- ( m-iodophenyl ) adenosine , revealed two [ 3h ] neca binding components with the characteristics of a1 and a2 receptors .
C0001443
adenosine
C0050789
neca