5'-n-ethylcarboxamidoadenosine ( neca ) , r-n6-phenylisopropyl-adenosine ( pia ) , n6-cyclohexyl-adenosine ( cha ) and 2-chloroadenosine all stimulated cyclic amp formation with a threshold close to 1 mumol l-1 ) ;
C0050789
5
C0001443
adenosine