5'-n-ethylcarboxamide adenosine ( neca ) and 5'-n-cyclopropylcarboxamide adenosine ( ncpca ) were about 100 times more potent as relaxants of the aorta than l-n6-phenylisopropyladenosine ( l-pia ) and n6-cyclohexyladenosine .
C0001443
adenosine
C0031484
l