the order of potency of these agonists in producing negative chronotropic effects was similar to the rank order for their a1 receptor binding activities [ 6-n-cyclohexyladenosine ( cha ) = 6-n- ( r-phenylisopropyl ) -adenosine greater than 5'-n-ethylcarboxamideadenosine ( neca ) = 2-chloroadenosine greater than 2-phenylaminoadenosine ] with a correlation coefficient of 0.97 .
C0001443
adenosine
C0000275
2-chloroadenosine