An adenosine A1 and A3 receptor agonist; binds selectively to rat adenosine A1 and human adenosine A3 receptors over rat adenosine A2A and A3 receptors (Kis = 4.9, 4.7, 8,900 and 1,050 nM, respectively, for the recombinant receptors in CHO cells); inhibits forskolin-induced cAMP accumulation in CHO cells expressing the human recombinant adenosine A3 receptor at 10 µM