a2 receptor activation was measured by the ability of these adenosine agonists to relax porcine coronary smooth muscle , where the compounds varied in their ec50 values from 4.5 nm ( cgs 21680a ( 2- [ p- ( 2-carboxyethyl ) phenylethylamino ] -5'-n-ethylcarboxamidoadenosine ) ] to 3.6 microm ( cgs 23321 [ 2 alpha,3 alpha-dihydroxy-1 beta-hydroxymethyl-4 beta- ( 2-phenylamino-9- adenyl ) -cyclopentane ] ) .
C0001443
adenosine
C0050789
5