competition experiments in both striatum and olfactory tubercle with various adenosine agonists and antagonists indicated that the sites labeled by [ 3h ] neca in the presence of 50 nm cpa were a2 in nature , the rank order of activity for agonists being neca greater than 2-chloroadenosine ( 2-cado ) , greater than r-n6-phenylisopropyladenosine ( r-pia ) greater than cpa greater than s-n6-phenylisopropyladenosine ( s-pia ) .
C0001443
adenosine
C0031484
phenylisopropyladenosine