Add time:08/03/2019         Source:sciencedirect.com

In order to identify a high-affinity, selective antagonist for the A2B subtype adenosine receptor, more than 40 1,8-disubstituted-3-(3-methoxypropyl) xanthines were prepared and evaluated for their binding affinity at recombinant human adenosine receptors, mainly of the A2A and A2B subtypes. Some of the 1-ethyl-3-(3-methoxypropyl)-8-aryl substituted derivatives 15(a–m) showed moderate-to-high affinity at human A2B receptors, with compound 15d showing A2B selectivity over the other A receptors assayed (A1, A2A, A3) of 34-fold or over.

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