the effect was promptly reversed by the adenosine receptor antagonist 8-phenyltheophylline and appeared to be mediated through an adenosine a2-receptor [ rank order of potency : 5'- ( n-ethyl ) -carboxamido-adenosine ( neca ) greater than adenosine greater than ( - ) -n6- ( phenylisopropyl ) adenosine ( pia ) greater than or equal to ( + ) -pia ] .
C0050789
neca
C0001443
adenosine