the rank order of potency 5'-ethylcarboxamido adenosine ( neca ) greater than 5'-methylcarboxamido adenosine ( meca ) greater than n6- [ ( r ) -1-methyl-2-phenylethyl ] adenosine ( r-pia ) greater than n6-cyclohexyladenosine ( cha ) = n6-cyclopentyladenosine ( cpa ) greater than n6- [ ( s ) -1-methyl-2-phenylethylladenosine ( s-pia ) greater than n6- ( 2-hydroxyethyl ) adenosine ( 2-oh-ethyl ) was observed for inhibiting both activities .
C0050789
neca
C0001443
adenosine