the results indicate that dose-dependent antinociception was produced by intrathecal injection of norepinephrine ( 4.8-195 nmol ) , the a1/a2 adenosine agonist 5'-n-ethylcarboxamide adenosine ( neca ; 0.97-4.9 nmol ) , and the a1 adenosine agonist r-phenylisopropyladenosine ( r-pia ; 0.78-26 nmol ) .
C0001443
adenosine
C0031484
phenylisopropyladenosine