low doses ( 0.25-5 mu/kg ) of synthetic adenosine receptor agonists potentiated all four of the tested sympathomimetic responses to nicotine , exhibiting the rank order of potency : n-cyclopropylcarboxamidoadenosine greater than 2-chloroadenosine greater than n6-r-phenylisopropyl adenosine greater than n6-s-phenylisopropyladenosine .
C2917194
adenosine receptor agonists
C0001443
adenosine