in equilibrium competition experiments the adenosine analogs r-phenylisopropyladenosine ( r-pia ) , n-ethylcarboxamidoadenosine ( neca ) and s-phenylisopropyladenosine ( s-pia ) all displayed higher affinities for a1 receptors in s. alascanus as compared to s. altivelis brain membranes ( table 2 , fig . 6 ) .
C0001443
adenosine
C0031484
phenylisopropyladenosine