the receptors involved in adenosine-induced modulation of cholinergic neuroeffector transmission in guinea-pig ileum were explored by means of the non-selective stable analogue , 2-chloroadenosine and analogues with preference for ai receptors , l-n6-phenylisopropyladenosine ( l-pia ) , and a2 receptors , 5'-n-ethylcarboxamideadenosine ( neca ) and d-n6-phenylisopropyladenosine ( d-pia ) .
C0001443
adenosine
C0031484
phenylisopropyladenosine