adenosine and its analogs ( 5'-n-ethyl-carboxamide adenosine , neca and n6-l-phenyl-isopropyl adenosine , l-pia ) , produced concentration-dependent relaxations of the tonic contractions and the order of potency was found to be : neca greater than l-pia greater than adenosine .
C0050789
neca
C0001443
adenosine