MRS 1523 can exert an antihyperalgesic effect through N-type Ca channel block and action potential inhibition in isolated rat dorsal root ganglion (DRG) neurons. MRS 1523 is an effective and selective adenosine A3 receptor antagonist Ki: 18.9 nM and 113 n
FR-194921 is a potent, selective, and orally active antagonist for central adenosine A1receptors with cognitive-enhancing and anxiolytic activity. FR194921 has same binding affinity profile among human, rat, and mouse.