the effects of 5'-n-ethylcarboxamidoadenosine ( neca ) , l-neca , 2-chloroadenosine , n6-phenylisopropyladenosine ( l-pia and d-pia ) , cyclohexyladenosine ( cha ) , and adenosine were examined on the guinea-pig taenia coli .
C0000275
2-chloroadenosine
C0001443
adenosine