additional studies with other adenosine analogs , such as 5'-n-ethyl-carboxamine adenosine , r-n6-phenylisopropyladenosine , s-n6-phenylisopropyladenosine and n6-cyclohexyladenosine , indicate that the p1-receptor is of the a1 subtype .
C0001443
adenosine
C0031484
phenylisopropyladenosine