some analogues of adenosine , including n6-phenylisopropyladenosine ( pia ) , 2-chloroadenosine and adenosine 5'-ethylcarboxamide ( neca ) , were more active than adenosine , whereas others such as 2-deoxyadenosine and 9- ( tetrahydro-2-furyl ) adenine ( sq 22536 ) actually inhibited the response .
C0050789
neca
C0001443
adenosine