the rank order of activity of adenosine agonists in displacing specific [ 3h ] neca binding was neca greater than or equal to 2-chloroadenosine greater than cha greater than or equal to 5'-n-methylcarboxamido adenosine greater than or equal to r-pia greater than cpa greater than s-pia .
C0050789
neca
C0001443
adenosine