the ability of caffeine , enprofylline ( 3-propylxanthine ) , 8-phenyltheophylline , 8-p-sulphophenyl-theophylline , 8- ( 4'-carboxymethyloxyphenyl ) -1,3-dipropylxanthine , and 8- ( 4'-carboxymethyloxyphenyl ) -1,3-dipropylxanthine-2-aminoethyl amide ( xac ) to antagonize the effects of an adenosine analogue , n-5'-ethylcarboxamidoadenosine , on heart rate and blood pressure in anesthetized rats was examined .
C0001443
adenosine
C0050789
n