adenosine ( 100 , 300 mumol/l ) and its structural analogues , namely ( - ) -n6- ( r-phenylisopropyl ) -adenosine ( r-pia ; 3-30 mumol/l ) and s-pia ( 10 , 30 mumol/l ) , as well as 5'-n-ethylcarboxamido-adenosine ( neca ; 3-30 mumol/l ) inhibited the firing rate of spontaneous action potentials and produced hyperpolarization ;
C0001443
adenosine
C0050789
neca