Abstract
New fluorescent ligands for adenosine receptors (ARs), obtained by
the insertion, in the N(6) position of NECA, of NBD-moieties with
linear alkyl spacers of increasing length, proved to possess a high
affinity and selectivity for the A(3) subtype expressed in CHO cells.
In fluorescence microscopy assays, compound 2d, the most active and
selective for human A(3)-AR, permitted visualization and localization
of this human receptor subtype, showing its potential suitability
for internalization and trafficking studies in living cells.
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