concentration-dependent effects on camp are also observed with n6- ( l-2-phenylisopropyl ) adenosine ( ec50 , approximately 0.75 nm ) , 5'-n-ethylcarboxy aminoadenosine ( ec50 , approximately 0.75 nm ) , and 2-chloroadenosine ( ec50 , approximately 2.0 nm ) ;
C0001443
adenosine
C0000275
2-chloroadenosine