New, non-adenosine, high-potency agonists for the human adenosine A2B receptor with an improved selectivity profile compared to the reference agonist N-ethylcarboxamidoadenosine.

@article{Beukers2004NewNH,
  title={New, non-adenosine, high-potency agonists for the human adenosine A2B receptor with an improved selectivity profile compared to the reference agonist N-ethylcarboxamidoadenosine.},
  author={Margot W. Beukers and Lisa C W Chang and Jacobien K. von Frijtag Drabbe K{\"u}nzel and Thea Mulder-Krieger and Ronald F Spanjersberg and Johannes Brussee and Adriaan P. IJzerman},
  journal={Journal of medicinal chemistry},
  year={2004},
  volume={47 15},
  pages={
          3707-9
        }
}
The adenosine A(2B) receptor is the least well characterized of the four known adenosine receptor subtypes because of the absence of potent, selective agonists. Here, we present five non-adenosine agonists. Among them, 2-amino-4-(4-hydroxyphenyl)-6-(1H-imidazol-2-ylmethylsulfanyl)pyridine-3,5-dicarbonitrile, 17, LUF5834, is a high-efficacy partial agonist with EC(50) = 12 nM and 45-fold selectivity over the adenosine A(3) receptor but lacking selectivity versus the A(1) and A(2A) subtypes… 
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